No sacred fane requires us to submit to insult.

When I consider the narrow limits within which our active and inquiring faculties are confined; when I see how all our energies are wasted in providing for mere necessities, which again have no further end than to prolong a wretched existence; and then that all our satisfaction concerning certain subjects of investigation ends in nothing better than a passive resignation... when I consider all this... I am silent.

Man is made by his belief. As he believes, so he is.

Quite often, as life goes on, when we feel completely secure as we go on our way, we suddenly notice that we are trapped in error, that we have allowed ourselves to be taken in by individuals, by objects, have dreamt up an affinity with them which immediately vanishes before our waking eye; and yet we cannot tear ourselves away, held fast by some power that seems incomprehensible to us. Sometimes, however, we become fully aware and realize that error as well as truth can move and spur us on to action.

Analysis and synthesis are both as necessary to the thinking spirit as inspiration and expiration to the organism.

Let everyone sweep in front of his own door, and the whole world will be clean.

The one who acts is always without conscience; nobody has a conscience but the contemplative person.