The question of the value of nationality in art is perhaps unsolvable.
Yes, linseed oil. I used to use poppy oil, but I have heard that poppy oil is given to cracking pigment too, so I use it no longer.
If you could say it in words there would be no reason to paint.
Painting will have to deal more fully and less obliquely with life and nature's phenomena before it can again become great.
More of me comes out when I improvise.
No amount of skillful invention can replace the essential element of imagination.