The painter strives and competes with nature.
He who cannot establish dominion over himself will have no dominion over others.
Who would believe that so small a space could contain the images of all the universe?
Those who become enamoured of the art, without having previously applied to the diligent study of the scientific part of it, may be compared to mariners who put to the sea in a ship without rudder or compass and therefore cannot be certain of arriving at the wished for port.
Happy will they be who lend ear to the words of the dead.
He who does not understand the supreme certainty of mathematics is wallowing in confusion.