On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow.

In almost all sciences the fundamental knowledge is either found in earliest times or is still being sought.

You must climb above yourself-up and beyond, until you have even your stars under you.

I assess the power of a will by how much resistance, pain, torture it endures and knows how to turn to its advantage.

God remains dead. And we have killed him. Yet his shadow still looms. How shall we comfort ourselves, the murderers of all murderers?

The person lives most beautifully who does not reflect upon existence

Because men really respect only that which was founded of old and has developed slowly, he who wants to live on after his death must take care not only of his posterity but even more of his past.