Not boasting of things without our measure, that is, of other men's labours; but having hope, when your faith is increased, that we shall be enlarged by you according to our rule abundantly,
Not boasting to unmeasured bounds of (literally, 'in') other men's labours.
When - `AS your faith goes on increasing' х auxanomenees (G837) tees (G3588) pisteoos (G4102)]. The cause of his not yet reaching the regions beyond Corinth was the weakness as yet of their faith. He desired not to leave them before the proper time, yet not to put off preaching to others too long.
Enlarged by you, х en (G1722) humin (G5213)] - 'in your case.' Our success in your case will be an important step toward further progress beyond (2 Corinthians 10:16). Calvin makes the balance of the opposite clauses better, 'Having hope that, as your faith goes on increasing among yourselves х en (G1722) humin (G5213)], we may be magnified according to our rule abundantly,' by preaching beyond you: a gain at once to both parties, them and Paul.
According to our rule - our divinely-assigned sphere of work; for "we stretch not ourselves beyond our measure" (2 Corinthians 10:14). Abundantly - Greek, 'unto exceeding abundance,' so as to exceed the limits yet reached (2 Corinthians 10:16).