Who goes to warfare any time at his own expense? who plants a vineyard, and eats not of the fruit thereof? or who feeds a flock, and eats not of the milk of the flock?
All Commentaries on 1 Corinthians 9:7 Go To 1 Corinthians 9
Augustine of Hippo
AD 430
The church has its own soldiers and its own provincial officers … its vineyard and its planters, its flock and its shepherds… Thus some are rightly fed and clothed at the expense of the charitable rich. They accept nothing for their own necessities except from those who sell their goods. They are not to be judged and condemned by the more perfect members of Christ who furnish their own needs with their own hands— a higher virtue which the apostle strongly commends. They in turn ought not to condemn as Christians of lower grade those from whose resources they are supplied… The servants of God who live by selling the honest works of their own hands could, with much less impropriety, condemn those from whom they receive nothing than could those others who are unable to work with their hands because of some bodily weakness yet who condemn the very ones at whose expense they live. Letter , To Hilarius.