I'm a middle of the road played who learned from his father at an early age. I'm working on my openings the most, as it's overwhelming how much there is to learn. Some of my favorate quotes:
“I don't believe in psychology. I believe in good moves”
“The Pin is mightier than the sword”
“The chessboard is the world, the pieces are the phenomena of the
Universe, the rules of the game are what we call the laws of Nature
and the player on the other side is hidden from us”
“Strategy requires thought, tactics require observation”