Abstract Thinking Quotes

"The possible ranks higher than the actual." "The debt we owe to the play of the imagination is incalculable." "Homo sapiens is the only species on Earth capable of imagining things that do not really exist." "An idea is always a generalization, and generalization is a property of thinking. To generalize means to think." "I am incapable of conceiving infinity, and yet I do not accept finity" "Evil is the product of the ability of humans to make abstract that which is concrete."