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16For if I preach the gospel, I have nothing to boast about, for I am under compulsion; for woe to me if I do not preach the gospel. 17For if I do this voluntarily, I have a reward; but if against my will, I have been entrusted with a commission nonetheless. 18What, then, is my reward? That, when I preach the gospel, I may offer the gospel without charge, so as not to make full use of my right in the gospel.