“Isaiah 58:1–12: The Power of Fasting and Prayer,” Old Testament Seminary Teacher Manual (2026)
“Isaiah 58:1–12: The Power of Fasting and Prayer,” Old Testament Seminary Teacher Manual
Isaiah 58–66: Lesson 126
Isaiah 58:1–12
The Power of Fasting and Prayer
The Lord has asked us to fast. How do you feel about this commandment? The Jews felt like the Lord did not acknowledge their fasting. Through Isaiah, the Lord taught the people about proper fasting. This lesson can help students feel a desire to fast in the Lord’s way.
Student preparation: Invite students to ponder how they feel about fasting and why. They might also ask a parent or trusted friend to share their thoughts and feelings.
Possible Learning Activities
Fasting
To help prepare students to learn about fasting, consider doing the following. As you discuss this topic, try to create an atmosphere where students can share openly without pressure or judgment.
Imagine that one Sunday morning, you are ready to eat breakfast when you remember that it is fast Sunday.
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What are the first thoughts that enter your mind?
If needed, share the following explanation of fasting from the General Handbook:
The Lord has established the law of the fast and fast offerings to bless His people and to provide a way for them to serve those in need. …
Fasting may be done at any time. However, members usually observe the first Sabbath of the month as a fast day. A fast day typically includes the following:
Praying
Going without food and drink for a 24-hour period (if physically able)
Giving a generous fast offering
A fast offering is a donation to help those in need. When members fast, they are invited to give an offering that is at least equal to the value of the meals not eaten. Members are encouraged to be generous and give more than the value of these meals if they can. (General Handbook: Serving in The Church of Jesus Christ of Latter-day Saints, 22.2.2., Gospel Library)
Take a moment to ponder how you feel about fasting as you reflect on the following questions:
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How do you feel about fasting? Why?
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If you have fasted before, what have you learned about the Lord and fasting from your experience?
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What concerns or questions do you have about fasting?
As you study today, seek the Lord’s guidance to help with any concerns you have and to feel a desire to fast.
The Lord’s teachings about fasting
The Lord directed Isaiah to boldly declare the sins of the house of Israel. For example, they outwardly performed religious practices, including fasting, with the wrong intent.
Consider explaining or displaying any of the following information that might help students as they read the verses below:
Read Isaiah 58:3–5, looking for the answers to these two questions:
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What did the people ask the Lord about their fasting?
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What did the Lord tell the people they had done incorrectly regarding their fast?
Invite students to share their answers and what stood out to them. If needed, point out that as Israel fasted, they sought their own pleasure (verse 3), saw fasting as an affliction (verses 3, 5), and treated others poorly (verses 3–4).
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How might we make similar mistakes as we fast?
Explain that the Lord intends for us to fast differently from these people. He intends that we fast with a humble attitude, purpose, and real intent (see Psalm 35:13; Joel 2:12; Jonah 3:4–10; Matthew 6:16–18; Alma 5:46; 6:6;17:3, 9).
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Why do you think the Lord wants us to fast humbly, with a specific righteous purpose and real intent?
Promises of the Lord
Consider writing the following on the board: If we fast in the way the Lord intends, then…
Read Isaiah 58:6–12, looking for the purposes and blessings the Lord promises to those who fast as the Lord intends. You may want to mark them.
Isaiah 58:6–7 is a doctrinal mastery passage. Consider inviting students to mark doctrinal mastery passages in a distinctive way so they can locate them easily.
Ask students to complete the sentence based on their study. They may write their answers on the board. The following are some examples:
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He will loosen the hold of wickedness or sin upon us (see Isaiah 58:6).
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He will undo heavy burdens (see Isaiah 58:6).
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We will care for the poor and needy (see Isaiah 58:7).
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He will bless us with light and health (see Isaiah 58:8).
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He will answer our prayers (see Isaiah 58:9).
The blessings of fasting
To help students understand the blessings they identified, invite them to select one or two of the following situations:
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A young man is stressed out about his schoolwork and his future.
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A young woman feels like she can never be clean again because of her sins.
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A young man is praying to know if the Church is true but is struggling to receive an answer.
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A young woman wants to help the poor.
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A young man faces a challenge he doesn’t know if he can overcome.
Find a phrase from Isaiah 58:6–12 that might motivate the person in the situation to fast and pray for God’s help. (Some situations may have more than one phrase that could apply.)
In small groups or as a class, invite students to share the situations they selected and the phrases that could help and why.
You might also invite them to share other situations in which the blessings the Lord promised in these verses may be helpful or ask if any of these blessings were especially meaningful to them and why.
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How might fasting for and receiving these blessings bring you closer to Heavenly Father and Jesus Christ?
Examples of fasting and paying fast offerings
To help students understand the example of the Savior, explain that He fasted and taught about fasting while also living the principle. He fasted before his earthly ministry (see Matthew 4:1–2 and note that the Joseph Smith Translation for Matthew 4:1 adjusts the phrase “to be tempted of the devil” to “to be with God”). He also taught that some evil influences only depart “by prayer and fasting” (Matt. 17:19, 21).
Consider showing the following modern-day example of fasting and ask students what they liked or learned from it:
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“Fast Offerings: A Simple Commandment with a Marvelous Promise” (3:01): President Henry B. Eyring tells of a woman’s experience with fast offerings in Sierra Leone during a war.
Invite students to ponder their own experiences with fasting, as well as the following questions, for a few moments:
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What blessings has the Lord given you or those you know because of fasting?
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How do you or could you make your fast more meaningful?
Consider sharing your own experiences as well.
Your feelings about fasting
Consider any impressions you have received through the Holy Ghost during this lesson as you write in your study journal how you feel about fasting. You may choose to include blessings from the Lord you want in your life and why.
Memorize
You may want to help students memorize the doctrinal mastery reference and key scripture phrase during this lesson and review them in future lessons. The key scripture phrase for “Isaiah 58:6–7” is “the blessings of a proper fast.” Ideas for memorization activities are in the appendix materials under “Doctrinal Mastery Review Activities.”