The vanity of the passing world and love are the two fundamental and heart-penetrating notes of true poetry. And they are two notes of which neither can be sounded without causing the other to vibrate.

It is sad not to be loved but it is much sadder not to be able to love

And wherefore do you want to be immortal? you ask me, wherefore? Frankly, I do not understand the question, for it is to ask the reason of the reason, the end of the end, the principle of the principle.

True science teaches, above all, to doubt and to be ignorant

vencereís pero no convencereís