Forming imagery helps too. There are vast possibilities open for those who learn to form inner, mental images in good, bright ways and link them up with issues and ideas of good worth. In the long run it may improve one's lot, because schooling and school-linked results depend on it considerably. There are rewards to be gained by those who learn to make the most of their minds in these ways and other ways. Creative images may climax in the designs we hint at here and there.
Mind is deep.
Thought is shallow. We won't say all thought is shallow. Nirdesa Sutra of Mahayana Buddhism. Learning taxonomy was devised to sort that out too. He was a genius.