Whatever folly men commit, be their shortcomings or their vices what they may, let us exercise forbearance; remember that when these faults appear in others it is our follies and vices that we behold.
To repeat abstractly, universally, and distinctly in concepts the whole inner nature of the world , and thus to deposit it as a reflected image in permanent concepts always ready for the faculty of reason , this and nothing else is philosophy.
The discovery of truth is prevented more effectively, not by the false appearance things present and which mislead into error, not directly by weakness of the reasoning powers, but by preconceived opinion, by prejudice.
Philosophy ... is a science, and as such has no articles of faith; accordingly, in it nothing can be assumed as existing except what is either positively given empirically, or demonstrated through indubitable conclusions.
Nothing shocks our moral feelings so deeply as cruelty does. We can forgive every other crime, but not cruelty. The reason for this is that it is the very opposite of compassion.
For an act to be moral the intention must be based on compassion, not duty. We do something because we want to do it, because we feel we have to do it, not because we ought to do it. And even if our efforts fail - or we never even get to implement them - we are still moral because our motivation was based on compassion.