“..keep working quietly and have faith in what I tell you, never ask how someone else did it or is doing, try to understand nature, observe everything, try to learn to see and find your easiest way to represent it; one can make different choices from nature, follow what the heart tells you, for which you feel the most.. ..search for what contains effect, something what wants to tell clear things. (translation from the Dutch original: Fons Heijnsbroek)”