Intelligence is a mere instrument of circumstances.
 F. Scott Fitzgerald, The Beautiful and Damned (1922). copy citation

Context

“"Not one jot!" Again Maury's voice dropped down to them as from a great height. "What a feeble thing intelligence is, with its short steps, its waverings, its pacings back and forth, its disastrous retreats! Intelligence is a mere instrument of circumstances. There are people who say that intelligence must have built the universe—why, intelligence never built a steam engine! Circumstances built a steam engine. Intelligence is little more than a short foot-rule by which we measure the infinite achievements of Circumstances.” source