I rediscovered this verse recently and I love it!
“But by the grace of God I am what I am: and his grace which was bestowed upon me was not in vain; but I laboured more abundantly than they all: yet not I, but the grace of God which was with me.” 1 Corinthians 15:10
Paul realized he wasn’t perfect and needed God’s grace. He didn’t take credit for how far he had come in his Christian life, but gave the credit to God. He knew that he was able to serve God because God gave him grace. And he didn’t let God’s grace on him go to waste. He served God with his life. We need to rely on God’s grace to help us do right.