Profundity of thought belongs to youth, clarity of thought to old age.

The snake that cannot shed its skin perishes.

Ultimately, it is the desire, not the desired, that we love.

Many deeds are done so as to forget another deed: there are also opiate activities. I exist so that another will be forgotten.

Examine the life of the best and most productive men and nations, and ask yourselves whether a tree which is to grow proudly skywards can dispense with bad weather and storms. Whether misfortune and opposition, or every kind of hatred, jealousy, stubbornness, distrust, severity, greed, and violence do not belong to the favourable conditions without which a great growth even of virtue is hardly possible?

Truth is only an illusion we have forgotten is an illusion.

Learn to laugh at yourselves as one must laugh!