Read much; you are young, digestion will be easy. Live in good company, and cultivate intimacy with young people who are well advanced in art.
Never wish to be greater than you are; above all things beware of expressing other people's opinions as if they were your own: that brings ruin; it leads to darkness; dare to be yourself; that will bring you light.
... cultivate your heart; above all things, be humble; in the art of painting, humility is the greatest strength.
Thomas Couture, Conversations on Art Methods, as translated by S.E. Stewart, (G.P. Putnam's Sons, New York, 1879), p. 11.