Learning never exhausts the mind. Read Summary
There are three classes of people: those who see, those who see when they are shown, those who do not see. Read Summary
Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity. Read Summary
I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do. Read Summary
I have offended God and mankind because my work didn't reach the quality it should have. Read Summary
Why does the eye see a thing more clearly in dreams than the imagination when awake? Read Summary
Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind. Read Summary
Who sows virtue reaps honor. Read Summary
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. Read Summary
Intellectual passion drives out sensuality. Read Summary
He who wishes to be rich in a day will be hanged in a year. Read Summary
The smallest feline is a masterpiece. Read Summary
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. Read Summary
Painting is concerned with all the 10 attributes of sight; which are: Darkness, Light, Solidity and Colour, Form and Position, Distance and Propinquity, Motion and Rest. Read Summary
Every action needs to be prompted by a motive. Read Summary
Medicine is the restoration of discordant elements; sickness is the discord of the elements infused into the living body. Read Summary
All knowledge which ends in words will die as quickly as it came to life, with the exception of the written word: which is its mechanical part. Read Summary
The natural desire of good men is knowledge. Read Summary
Necessity is the mistress and guide of nature. Necessity is the theme and inventress of nature, her curb and her eternal law. Read Summary
Men of lofty genius when they are doing the least work are most active. Read Summary