Sri Aurobindo
Letters of Sri Aurobindo
06. Transformation of the Mind
All depends on the meaning you attach to words used; it is a matter of nomenclature. Ordinarily, one says a man has intellect if he can think well; the nature and process and field of the thought do not matter. If you take intellect in that sense, then you can say that intellect has different strata, and Ford belongs to one stratum of intellect, Einstein to another – Ford has a practical and executive business intellect, Einstein a scientific discovering and theorising intellect. But Ford too in his own field theorises, invents, discovers. Yet would you call Ford an intellectual or a man of intellect? I would prefer to use for the general faculty of mind the word intelligence. Ford has a great and forceful practical intelligence, keen, quick, successful, dynamic. He has a brain that can deal with thoughts also, but even there his drive is towards practicality. He believes in rebirth (metempsychosis), 
for instance, not for any philosophic reason, but because it explains life as a school of experience in which one gathers more and more experience and develops by it. Einstein has, on the other hand, a great discovering scientific intellect, not, like Marconi, a powerful practical inventive intelligence for the application of scientific discovery. All men have, of course, an “intellect” of a kind; all, for instance, can discuss and debate (for which you say rightly intellect is needed); but it is only when one rises to the realm of ideas and moves freely in it that you say, “This man has an intellect.” Address an assembly of peasants, you will find, if you give them scope, that they can put to you points and questions which may often leave the parliamentary debater panting. But we are content to say that these peasants have much practical intelligence.
The power to discuss and debate is, as I say, a common human faculty – and habit. Perhaps it is here that man begins to diverge from the animal; for animals have much intelligence, many animals and even insects have some rudimentary power of practical reasoning, but so far as we know, they do not meet and put their ideas about things side by side or sling them at each other in a debate1, as even the most ignorant human can do and very animatedly does.
But this, though a general faculty of the race, is very often specialised, so much so that a man whom it is dangerous to cross in debate in the field of literature or of science or of philosophy may yet make a fool of himself and wallow contentedly in a quagmire of blunders and fallacies if he discusses politics or economics or, let us say, spirituality or yoga. His only salvation is the blissful depth of his ignorance which prevents him from seeing what a mess he has made. Again, a man may be a keen legal or political debater, the two very commonly go together, yet no intellectual. I admit that a man must have some logical intellect to debate well. But, after all, the object of debate is to win, to make your point, and you may do that even if your point is false; success, not truth, is the aim of debate. So I admit what you say with reservations.
I agree also that labels, even when applied to less developed 
persons, are unsatisfactory. What we really do is to pick out something prominent and label with that as if it were all the person. But classification is impossible without that and man’s intellect is driven always to classify, fix distinctions, set apart with a label. The philosophers have pointed out that Science does it too rigidly and in doing so cuts falsely across the truth of Nature. But if we do not do that, we cannot have any Science.