Ephesians 2:8-9 - "For you have received the gift of grace, through faith - and it is not from yourselves, it is the gift of God - not by works, that no one can boast"
1 Corinthians 1:8 - "He will also keep you firm to the end, so that you will be blameless on the day of our Lord Jesus Christ"
2 Corinthians 12:9 - "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"