Freedom is absolutely necessary for the progress in science and the liberal arts.

Philosophy has no end in view save truth; faith looks for nothing but obedience and piety.

If the way which I have pointed out as leading to this result (i.e., power over the emotions by which the wise man surpasses the ignorant man) seems exceedingly hard, it may nevertheless be discovered. Needs must it be hard, since it is so seldom found. How would it be possible, if salvation were ready to our hand, and could without great labour be found, that it should be by almost all men neglected? But all things excellent are as difficult as they are rare.

The safest way for a state is to lay down the rule that religion is comprised solely in the exercise of charity and justice, and that the rights of rulers in sacred, no less than in secular matters, should merely have to do with actions, but that every man should think what he likes and say what he thinks.

Simply from the fact that we have regarded a thing with the emotion of pleasure or pain, though that thing be not the efficient cause of the emotion, we can either love or hate it.

We are so constituted by Nature that we easily believe the things we hope for, but believe only with difficulty those we fear, and that we regard such things more or less highly than is just. This is the source of the superstitions by which men everywhere are troubled. For the rest, I don

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