Tell me what you feel in your room when the full moon is shining in upon you and your lamp is dying out, and I will tell you how old you are, and I shall know if you are happy.

True humility is contentment.

The great majority of men are but tangled skeins, imperfect keyboards, so many specimens of restless or stagnant chaos--and what makes their situation almost hopeless is the fact that they take pleasure in it. There is no curing a sick man who believes himself in health.

I find myself regarding existence as though from beyond the tomb, from another world; all is strange to me; I am, as it were, outside my own body and individuality; I am depersonalized, detached, cut adrift. Is this madness?

The man who insists upon seeing with perfect clearness before he decides, never decides. Accept life, and you must accept regret.

Without passion man is a mere latent force and possibility, like the flint which awaits the shock of the iron before it can give forth its spark.

Philosophy starts with doubt and loves only truth.