Not of grace but of debt (οὐ κατὰ χάριν ἀλλὰ κατὰ ὀφείλημα)
Lit., according to grace, etc. Not grace but debt is the regulative standard according to which his compensation is awarded. The workman for hire represents the legal method of salvation; he who does not work for hire, the gospel method; wages cannot be tendered as a gift. Grace is out of the question when wages is in question.