As soon as you trust yourself, you will know how to live.
The greater the knowledge, the greater the doubt.
Knowing is not enough; we must apply. Willing is not enough; we must do.
Belief is not the beginning of knowledge - it is the end.
Thinking is more interesting than knowing, but less interesting than looking.
We know accurately only when we know little, with knowledge doubt increases.
Never by reflection, but only by doing is self- knowledge possible to one.
When intelligent and sensible people despise knowledge in their old age, it is only because they have asked too much of it and of themselves.
Mediocrity has no greater consolation than in the thought that genius is not immortal.
The history of knowledge is a great fugue in which the voices of the nations one after the other emerge.
What is not fully understood is not possessed.
What we do not understand we do not possess.
With the growth of knowledge our ideas must from time to time be organized afresh. The change takes place usually in accordance with new maxims as they arise, but it always remains provisional.
The greatest piece of folly is that every man thinks himself compelled to hand down what people think they have known.
At all times it has not been the age, but individuals alone, who have worked for knowledge. It was the age which put Socrates to death by poison, the age which burnt Huss. The ages have always remained alike.
The real scholar learns how to evolve the unknown from the known, and draws near the master.
What a man does not understand, he does not possess.
It will be! the mass is working clearer! Conviction gathers, truer, nearer! The mystery which for Man in Nature lies We dare to test, by knowledge led; And that which she was wont to organize We crystallize, instead.
It is not enough to have knowledge; one must apply it. It is not enough to have wishes; one must also accomplish it.
Self-knowledge comes from knowing other men.
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