The Basis of Morality by Part 3 Chapter 9 Page 22

and ostensibly, with our acts, but through these they, in reality, reach down to what we are; for what we do is the only indisputable index of what we are, and reflects our character just as faithfully as symptoms betray the malady.

Hence it is to this Esse, to what we are, that blame and merit must ultimately be attributed. Whatever we esteem and love, or else despise and hate, in others, is not a changeable, transient appearance, but something constant, stable, and persistent; it is that which they are. If we find reason to alter our first opinion about any one, we do not suppose that he is changed, but that we have been mistaken in him. In like manner, when we are pleased or displeased with our own conduct, we say that we are satisfied or dissatisfied with ourselves, meaning, in reality, with that which we are, and are