If a man cannot do brain work without stimulants of any kind he had better turn to hand work it is an indication on Nature's part that she did not mean him to be a head worker.
It is not to be forgotten that what we call rational grounds for our beliefs, are often extremely irrational attempts to justify our instincts.
Nothing can be more incorrect than the assumption one sometimes meets, with that physics has one method. chemistry another. and biology a third.
There is no sea more dangerous than the ocean of practical politics, none in which there is more need of good pilotage and of a single unfaltering purpose when the waves rise high.
The great thing in the world is not so much to seek happiness, as to earn peace and self-respect.
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The only way to escape the corruptible effect of praise is to go on working.
This is the real secret of life – to be completely engaged with what you are doing in the here and now. And instead of calling it work, realize it is play.