Memorizing verses can be difficult. You have to set aside time to go over the verses, and you have to really commit.
But memorizing verses is worth the effort. When you memorize verses, it is easier to spread God's word, because you have the gospel and His truth readily available to give to someone. Memorizing verses also helps you to stand against the temptations of sin, because you can recite God's truth to yourself. You can also encourage others with verses you have memorized.

Below are 16 verses I think every Christian should memorize. They can be used for encouragement, edification and/ or spreading the gospel.

1. Romans 6:23

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"For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord."

2. Jeremiah 29:11

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""For I know the plans I have for you," declares the Lord, "plans to prosper you and not to harm you, plans to give you hope and a future.""

3. 2 Corinthians 12:9

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"But he said to me, "My grace is sufficient for you, for my power is made perfect in weakness." Therefore I will boast all the more gladly about my weaknesses, so that Christ's power may rest on me."

4. Romans 12:2

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"Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is—his good, pleasing and perfect will."

5. Psalm 27:1

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"The Lord is my light and my salvation—whom shall I fear? The Lord is the stronghold of my life—of whom shall I be afraid?"

6. Matthew 11:28

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"Come to me, all you who are weary and burdened, and I will give you rest."

7. Ephesians 2:8-9

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"For it is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God—not by works, so that no one can boast."

8. John 14:6

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"Jesus answered, "I am the way and the truth and the life. No one comes to the father except through me.""

9. Romans 8:38-39

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"For I am convinced that neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord."

10. John 3:16-17

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"For God so loved the world that He gave His one and only Son, that whoever believes in Him shall not perish but have eternal life. For God did not send His Son into the world to condemn the world, but to save the world through Him."

11. Psalm 37:4-5

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"Delight yourself in the Lord and he will give you the desires of your heart. Commit your way to the Lord, trust in him and he will do this."

12. Matthew 6:33

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" But seek first his kingdom and his righteousness, and all these things will be given to you as well."

13. Galatians 2:20

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"I have been crucified with Christ and I no longer live, but Christ lives in me. The life I live in the body, I live by faith in the Son of God, who loved me and gave himself for me."

14. James 1:22

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"Do not merely listen to the word, and so deceive yourselves. Do what it says."

15. Matthew 28:19-20

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"Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age."

16. Hebrews 3:13

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"But encourage one another daily, as long as it is called "Today," so that none of you may be hardened by sin's deceitfulness."