Albert Barnes' Notes on the Whole Bible - 1 Corinthians 3:8
Are one - ἕν εἰσιν hen eisin. They are not the same person; but they are one in the following respects:(1) They are united in reference to the same work. Though they are engaged in different things - for planting and watering are different kinds of work, yet it is one in regard to the end to be gained. The employments do not at all clash, but tend to the same end. It is not as if one planted, and the other was engaged in pulling up.(2) Their work is one, because one is as necessary as the... read more
The Pulpit Commentary - 1 Corinthians 3:8
Are one; literally, one thing. God is the sole Agent; the teachers, so far from being able to pose as rival leaders, form but one instrument in God's hand. Their relative differences shrink into insignificance when the source and objects of their ministry are considered. His own reward… his own labour. In the lower individual sphere the work of teachers shall be fairly estimated and rewarded as in the parable of the pounds and talents (comp. John 4:36 ; Revelation 22:12 ). read more