Affectation is a very good word when someone does not wish to confess to what he would none the less like to believe of himself.

With God thoughts are colors, with us they are pigments-even the most abstract one may be accompanied by physical pain.

Non cogitant, ergo non sunt.

There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.

If it were true what in the end would be gained? Nothing but another truth. Is this such a mighty advantage? We have enough old truths still to digest, and even these we would be quite unable to endure if we did not sometimes flavor them with lies.

Be wary of passing the judgment: obscure. To find something obscure poses no difficult, elephants and poodles find many things obscure.

Ideas too are a life and a world.