Although the difference between the qualities of intelligence and intellect is more often assumed than defined, the context of popular usage makes it possible to extract the nub of the distinction, which seems to be almost universally understood: intelligence is an excellence of mind that is employed within a fairly narrow, immediate, and predictable range; it is a manipulative, adjustive, unfailingly practical quality---one of the most eminent and endearing of the animal virtues. Intelligence works within the framework of limited but clearly stated goals, and may be quick to shear away questions of thought that do not seem to help in reaching them. Finally, it is of such universal use that it can daily be seen at work and admired alike by simple or complex minds.
Intellect, on the other hand, is the critical, creative, and contemplative side of mind. Whereas intelligence seeks to grasp, manipulate, re-order, adjust, intellect examines, ponders, wonders, theorizes, criticizes, imagines. Intelligence will seize the immediate meaning in a situation and evaluate it. Intellect evaluates evaluations, and looks for the meanings of situations as a whole. Intelligence can be praised as a quality in animals; intellect, being a unique manifestation of human dignity, is both praised and assailed as a quality in men. When the difference is so defined, it becomes easier to understand why we sometimes say that a mind of admittedly penetrating intelligence is relatively unintellectual; and why, by the same token, we see among minds that are unmistakably intellectual a considerable range of intelligence.