Heres what a few of the truly great art photographers had to say about the thinking part:
"One does not think during creative work, any more than one thinks when driving a car. But one has a background of years - learning, unlearning, success, failure, dreaming, thinking, experience, all this - then the moment of creation, the focusing of all into the moment. So I can make 'without thought,' fifteen carefully considered negatives, one every fifteen minutes, given material with as many possibilities. But there is all the eyes have seen in this life to influence me." - Edward Weston
"Thinking should be done before and after, not during photographing. Success depends on the extent of one's general culture. one's set of values, one's clarity of mind one's vivacity. The thing to be feared most is the artificially contrived, the contrary to life." - Henri Cartier-Bresson
"My pictures are never pre-visialized or planned. I feel strongly that pictures must come from contact with things at the time and place of taking. At such times, I rely on intuitive, perceptual responses to guide me, using reason only after the final print is made to accept or rejetct the results of my work." - Wynn Bullock
"I frame with my eye (sometimes with my hands) as the ground glass would frame. Nothing that one could reasonably call thinking is taking place al this stage. The condition is total absorption; the decision (a picture) is spontaneous ... Ambiguity may be the clue, there is the material. and there am I intruding my private intent. I know the imminence of the world and experience it with full sensuality; at the same time I am involved with projection of myself as idea. Strong tensions are inevitable, pleasurable and disturbing. Is not the aesthetic optimum order with the tensions continuing? - Aaron Siskind
"I think the most beautiful inventions are the ones you don't think of." - Diane Arbus
also heres what the great Sci Fi writer Ray Bradbury said about:
"Don't think. Thinking is the enemy of creativity. It's self-conscious, and anything self-conscious is lousy."-Ray Bradbury