Wassily Kandinsky said this quote

Those [things] that we encounter for the first time immediately have a spiritual effect upon us. A child, for whom every object is new, experiences the world in this way: it sees light, is attracted by it, wants to grasp it, burns its finger in the process, and thus learns fear and respect for the flame.

~ Wassily Kandinsky

Color directly influences the soul. Color is the keyboard, the eyes are the hammers, the soul is the piano with many strings. The artist is the hand that plays, touching one key or another purposively, to cause vibrations in the soul.

~ Wassily Kandinsky

(...) an inner feeling called Stimmung by the germans and best translated as sentiment (it is to be regreted that this word, sentiment, which is meant to describe the poetical efforts of an artist living soul, has been misused and finally, ridiculed. Was there ever a great word that the masses did not try immediatly to cheapen and desecrate?) (...)

~ Wassily Kandinsky

A painter, who finds no satisfaction in mere representation, however artistic, in his longing to express his inner life, cannot but envy the ease with which music, the most non-material of the arts today, achieves this end. He naturally seeks to apply the methods of music to his own art. And from this results that modern desire for rhythm in painting, for mathematical, abstract construction, for repeated notes of colour, for setting colour in motion.

~ Wassily Kandinsky