Here's a thread I made on the topic from 1.5 years ago: Was Leonardo da Vinci an ISTP or INTP?
My best guess: INTP or ENTP, 5w6 or 7w6, and so/sx or so/sp.
Here's some quotes from the master:
"I see Christ once more being sold and crucified and his saints martyred." (Leonardo da Vinci)
And he respected science (more than claims of divine miracles).
"Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory."
"Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence as I said before with experience and from this to proceed to investigate the reason."
"There is no result in nature without a cause; understand the cause and you will have no need of the experiment."
"Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory." (Leonardo da Vinci)
"Beyond a doubt truth bears the same relation to falsehood as light to darkness."
"Blinding ignorance does mislead us. O! Wretched mortals, open your eyes! "
The painter's mind is a copy of the divine mind, since it operates freely in creating the many kinds of animals, plants, fruits, landscapes, countrysides, ruins, and awe-inspiring places by promising results which are not obtainable.
Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer. Go some distance away because then the work appears smaller and more of it can be taken in at a glance and a lack of harmony and proportion is more readily seen.
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.
As a well-spent day brings happy sleep, so a life well spent brings happy death.
There are three classes of people: those who see. Those who see when they are shown. Those who do not see.
Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind.
I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do. (Leonardo da Vinci)
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.
Men of lofty genius when they are doing the least work are most active.
The greatest deception men suffer is from their own opinions.
The human foot is a masterpiece of engineering and a work of art.
The noblest pleasure is the joy of understanding.
While I thought that I was learning how to live, I have been learning how to die.
And now for some videos: