To preserve the sense of the 'grey' even in the most powerful green is amazingly difficult and whoever discovers it will be a happy mortal. (translat… - Gerard Bilders

version in original Dutch / citaat van Bilders' brief, in het Nederlands: Om het sentiment van het grijze, zelfs in het krachtigste groen, te houden is verbazend moeylijk, en die het uitvindt is een gelukkig sterveling.

If you ever want to see the 'Nightwatch' [by Rembrandt ] at its best, visit it at two o'clock, half past three afternoon.. ..that time a warm light falls on the painting [then located in the Trippenhuis in Amsterdam]; another world opens, a world of glow, light and inimitable power. I think Rembrandt is not only beautiful, but – were we still in the Age of the old Gods, I would worship him. You can lose yourself in that painting; it is a complete abyss, deep and sky-high.. ..then suddenly I think of my own paintings - poor cow, dairy, and sheep compositions, and I doubt, will I ever become something..

The moon appeared for some time [in the Savoy, Switzerland] and the rocks seemed to be much bigger than they were. The mountains were silvery illuminated and appeared gently against the mysterious blue of the sky - that blue color with moonlight, that has such an indefinable, deep tone; actually it is not a blue.