God does the growing

1 Corinthians 3:6-9

I planted, Apollos watered, but God gave the growth. So neither he who plants nor he who waters is anything, but only God who gives the growth. He who plants and he who waters are one, and each will receive his wages according to his labor. For we are God's fellow workers. You are God's field, God's building.

We must always remember that God is the one who changes people, not us. We simply plant the seed (the gospel) someone else waters it but God is the one who changes people. We must always give God the glory and take none for ourselves.