Now he who plants and
he who waters are one,
and each one will receive his own reward
according to his own labor.
1 Corinthians 3:8
It is the Lord alone who can give the faith to the spiritually ignorant and dead. Salvation is God’s work of grace to whom He chooses to give it (Romans 9:15-19; Ephesians 2:8,9).
But all the human instruments God uses to produce salvation life are equally considered and rewarded for their willingness to be used by God. But all of the glory goes to Him, who alone saves.
Commentary from the MacArthur study Bible, notes for 1 Corinthians 3:5-7,8.