Commentaries
3:5-9 The ministers about whom the Corinthians contended, were only instruments used by God. We should not put ministers into the place of God. He that planteth and he that watereth are one, employed by one Master, trusted with the same revelation, busied in one work, and engaged in one design. They have their different gifts from one and the same Spirit, for the very same purposes; and should carry on the same design heartily. Those who work hardest shall fare best. Those who are most faithful shall have the greatest reward. They work together with God, in promoting the purposes of his glory, and the salvation of precious souls; and He who knows their work, will take care they do not labour in vain. They are employed in his husbandry and building; and He will carefully look over them.
8. one—essentially in their aim they are one, engaged in one and the same ministry; therefore they ought not to be made by you the occasion of forming separate parties.
and every man—rather "but every man." Though in their service or ministry, they are essentially "one," yet every minister is separately responsible in "his own" work, and "shall receive his own (emphatically repeated) reward, according to his own labor." The reward is something over and above personal salvation (1Co 3:14, 15; 2Jo 8). He shall be rewarded according to, not his success or the amount of work done, but "according to his own labor." It shall be said to him, "Well done, thou good and (not successful, but) faithful servant, enter thou into the joy of thy Lord" (Mt 25:23).