The Apostle Paul
2 Corinthians 6:10ESV·traditional attribution

as sorrowful, yet always rejoicing; as poor, yet making many rich; as having nothing, yet possessing everything.

Matthew Henry Presbyterian @wholebiblehenry

In these verses we have an account of the apostle's general errand and exhortation to all to whom he preached in every place where he came, with the several arguments and methods he used. Observe, I. The errand or exhortation itself, namely, to comply with the gospel offers of reconciliation - that, being favoured with the gospel, they would not receive this grace of God in vain, Co2 6:1.

Commenting on 2 Corinthians 6:1-10

John Gill Reformed Baptist @doctorgill

O ye Corinthians,.... The apostle having exhorted the ministers of the church at Corinth to take care of their ministry, that they fulfil it, and that it might appear that the Gospel, and gifts fitting them to preach it, were not received in vain by them; all which he strengthens and encourages by his own example; and that of others, addresses the members of the...

Albert Barnes Presbyterian @notesbybarnes

Verse 10. As sorrowful, λυπουμενοι. Grieving, afflicted, troubled, sad. Under these sufferings we seem always to be cast down and sad. We endure afflictions that usually lead to the deepest expressions of grief. If the world looks only upon our trials, we must be regarded as always suffering, and always sad.