Upon the progress of knowledge the whole progress of the human race is immediately dependent: he who retards that, hinders this also.

What sort of philosophy one chooses depends, therefore, on what sort of man one is; for a philosophical system is not a dead piece of furniture that we can reject or accept as we wish; it is rather a thing animated by the soul of the person who holds it.

Upon the progress of knowledge the whole progress of the human race is immediately dependent: he who retards that, hinders this also.

What sort of philosophy one chooses depends on what sort of person one is.

Not alone to know, but to act according to thy knowledge, is thy destination,--proclaims the voice of my inmost soul. Not for indolent contemplation and study of thyself, nor for brooding over emotions of piety,--no, for action was existence given thee; thy actions, and thy actions alone, determine thy worth.

My mind can take no hold on the present world, nor rest in it a moment, but my whole nature rushes onward with irresistible force towards a future and better state of being.

A man can do what he ought to do; and when he says he cannot, it is because he will not.