Read it through once

In fact, no person can be BOUND or OBLIGED, without some power preceding to bind and oblige. If I observe a man bound hand and foot, I know that some one bound him. But if I observe him returning self-satisfied from the performance of some action, by which he has been the willing author of extensive benefit, I do not infer that the anticipation of hellish agonies, or the hope of heavenly reward, has constrained him to such an act.