Love is nothing but joy accompanied with the idea of an eternal cause.

I do not presume that I have found the best philosophy, I know that I understand the true philosophy.

Men believe themselves to be free, simply because they are conscious of their actions, and unconscious of the causes whereby those actions are determined.

How would it be possible if salvation were ready to our hand, and could without great labor be found, that it should be by almost all men neglected? But all things excellent are as difficult as they are rare.

Self-complacency is pleasure accompanied by the idea of oneself as cause.

Whatever increases, decreases, limits or extends the body's power of action, increases decreases, limits, or extends the mind's power of action. And whatever increases, decreases, limits, or extends the mind's power of action, also increases, decreases, limits, or extends the body's power of action.

I do not know how to teach philosophy without becoming a disturber of established religion.