The task of the mind is to produce future, as the poet Paul Valery once put it. A mind is fundamentally an anticipator, an expectation-generator. It mines the present for clues, which it refines with the help of the materials it has saved from the past, turning them into anticipations of the future. And then it acts, rationally, on the basis of those hard-won anticipations.
One of these days, I'm going to publish a book of all the pictures I did not take.