No, our science is no illusion. But an illusion it would be to suppose that what science cannot give us we can get elsewhere.

My love is something valuable to me which I ought not to throw away without reflection.

One day, in retrospect, the years of struggle will strike you as the most beautiful.

The voice of the intellect is soft one, but it does not rest until it has gained a hearing. Ultimately, after endless rebuffs, it succeeds. This is one of the few points in which one may be optimistic about the future of mankind.

The scope of one’s personality is defined by the magnitude of that problem which is capable of driving a person out of his wits.

O homem não tem nada melhor para fazer do que tentar estar em perfeito acordo consigo mesmo.

If youth knew; if age could.

Desire presses ever forward unsubdued.

In the small matters trust the mind, in the large ones the heart.