„.. learn to draw: that's where most of you [Troyon's pupils] are falling down today.... draw with all your might; you can never learn to much. However, don't neglect painting, go to the country from time to time and make studies and above all develop them.“
— Constant Troyon
quoted by Monet, in his letter to Boudin, 1859; as quoted in Discovering Art, – The life time and work of the World's greatest Artists, MONET; K.E. Sullivan, Brockhamptonpress, London 2004, p. 11
Monet is quoting in his letter Troyon, who was a good friend of his first art-teacher Eugène Boudin in Le Havre