Anyone can squash a bug but all professors of this world couldn't build one.

Man shows his character best in trifles.

If a person is stupid, we excuse him by saying that he cannot help it; but if we attempted to excuse in precisely the same way the person who is bad, we should be laughed at.

The fourfold root of the principle of sufficent reason is "Anything perceived has a cause. All conclusions have premises. All effects have causes. All actions have motives.

Materialism is the philosophy of the subject who forgets to take account of himself.

Every parting gives a foretaste of death, every reunion a hint of the resurrection.

Every satisfaction he attains lays the seeds of some new desire, so that there is no end to the wishes of each individual will.