Care.

Pissarro, The Côte des Bœufs at L'Hermitage, 1879

I began to understand my sensations, to know what I wanted, at around the age of forty - but only vaguely.  At fifty, that is in 1880, I formulated the idea of unity, without being able to render it. At sixty, I am beginning to see the possibility of rendering it.  

Cover the canvas at the first go, then work at it until you see nothing more to add.  Don't be afraid in nature: one must be bold, at the risk of having been deceived and making mistakes. God takes care of imbeciles, little children and artists.

Camille Pissarro