A clever man without wisdom is like a beautiful flower without fragrance.
When counting, try not to mix chickens with blessings.
Your brain is much better than you think; just use it!
A beautiful body perishes, but a work of art dies not.
Fire destroys all sophistry, that is deceit; and maintains truth alone, that is gold.
Necessity is the mistress and guide of nature. Necessity is the theme and inventress of nature, her curb and her eternal law.
When you are alone you are all your own.
I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.
Each man is always in the middle of the surface of the earth and under the zenith of his own hemisphere, and over the centre of the earth.
I’m not contented to capture the world. I want to change it.
Experiment is the sole interpreter of the artifices of Nature.
Make an effort to collect the good features from many beautiful faces.
The bones of the Dead will be seen to govern the fortunes of him who moves them.
I have always felt it is my destiny to build a machine that would allow man to fly.
There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.
Whatever you do in life, if you want to be creative and intelligent, and develop your brain, you must do everything with the awareness that everything, in some way, connects to everything else.
The greater the man’s soul, the deeper he loves.
O sleepers! what a thing is slumber! Sleep resembles death. Ah, why then dost thou not work in such wise as that after death thou mayst retain a resemblance to perfect life, when, during life, thou art in sleep so like to the hapless dead?
Let proportion be found not only in numbers and measures, but also in sounds, weights, times, and positions, and what ever force there is.
Wherever good fortune enters, envy lays siege to the place and attacks it; and when it departs, sorrow and repentance remain behind.