As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.
I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.
In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time.
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.
It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.
Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.
Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.
The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.
There are three classes of people: those who see, those who see when they are shown, those who do not see.
Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.
Iron rusts from disuse; water loses its purity from stagnation… even so does inaction sap the vigor of the mind.
I love those who can smile in trouble, who can gather strength from distress, and grow brave by reflection. ‘Tis the business of little minds to shrink, but they whose heart is firm, and whose conscience approves their conduct, will pursue their principles unto death.
Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works. If it works big, others quickly copy it. Then you do something else. The trick is the doing something else.
The poet ranks far below the painter in the representation of visible things, and far below the musician in that of invisible things.