exercise. Greek. eskeo, to practise as an art, used of the healing art in medical writings. Only here.
conscience. Compare Act_23:1.
void of offence. Greek. aproskopos. The verb proskopto means to stumble, and this adjective here means "without stumbling", while in the other two ooc, 1Co_10:32. Php_1:1, Php_1:10, it means "not causing to stumble".