Key verse:

John 3:16 (NIV), “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.”

Related verses:

Matthew 17:20, ^'So Jesus said to them, “Because of your unbelief; for assuredly, I say to you, if you have faith as a mustard seed, you will say to this mountain, "Move from here to there," and it will move; and nothing will be impossible for you.'

John 1:12, 'But as many as received Him, to them He gave the right to become children of God, to those who believe in His name'

John 6:28-29, 'Then they said to Him, “What shall we do, that we may work the works of God?” Jesus answered and said to them, “This is the work of God, that you believe in Him whom He sent.”'

John 20:29, 'Jesus said to him, “Thomas, because you have seen Me, you have believed. Blessed are those who have not seen and yet have believed.”'

John 20:31, 'but these are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name.'

Romans 1:17, 'For in it the righteousness of God is revealed from faith to faith; as it is written, “The just shall live by faith.”'

Romans 5:8, 'But God demonstrates His own love toward us, in that while we were still sinners, Christ died for us.'

Romans 10:9, 'that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved.'

Romans 10:17, 'So then faith comes by hearing, and hearing by the word of God.'

1 Corinthians 12:8-9, 'for to one is given the word of wisdom through the Spirit, to another the word of knowledge through the same Spirit, to another faith by the same Spirit, to another gifts of healings by the same Spirit'

2 Corinthians 5:7, 'For we walk by faith, not by sight.'

Ephesians 2:8-9, 'For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.'

Hebrews 11:1, 'Now faith is the substance of things hoped for, the evidence of things not seen.'

Hebrews 11:6, 'But without faith it is impossible to please Him, for he who comes to God must believe that He is, and that He is a rewarder of those who diligently seek Him'

Hebrews 12:2, ' looking unto Jesus, the author and finisher of our faith, who for the joy that was set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.'

James 2:17, 'Thus also faith by itself, if it does not have works, is dead.'