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.

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

I know what I can know, and am not troubled about what I cannot know.

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.

There are two great classes of men: the people and the scholars, the men of science. For the former, nothing exists but that which directly leads to action. It is for the latter to see beyond. They are the free artists who create the future and its history, the conscious architects of the world.

Here below is not the land of happiness: I know it now; it is only the land of toil, and every joy which comes to us is only to strengthen us for some greater labor that is to succeed.

We do not act because we know, but we know because we are called upon to act; the practical reason is the root of all reason.