The dilemma is this. In the modern world knowledge has been growing so fast and so enormously, in almost every field, that the probabilities are immensely against anybody, no matter how innately clever, being able to make a contribution in any one field unless he devotes all his time to it for years. If he tries to be the Rounded Universal Man, like Leonardo da Vinci, or to take all knowledge for his province, like Francis Bacon, he is most likely to become a mere dilettante and dabbler. But if he becomes too specialized, he is apt to become narrow and lopsided, ignorant on every subject but his own, and perhaps dull and sterile even on that because he lacks perspective and vision and has missed the cross-fertilization of ideas that can come from knowing something of other subjects.

If you crave for Knowledge, the banquet of Knowledge grows and groans on the board until the finer appetite sickens. If, still putting all your trust in Knowledge, you try to dodge the difficulty by specialising, you produce a brain bulging out inordinately on one side, on the other cut flat down and mostly paralytic at that: and in short so long as I hold that the Creator has an idea of a man, so long shall I be sure that no uneven specialist realises it. The real tragedy of the Library at Alexandria was not that the incendiaries burned immensely, but that they had neither the leisure nor the taste to discriminate.... but we may agree that, in reading, it is not quantity so much that tells, as quality and thoroughness of digestion.

Favoring specialization over intelligence is exactly wrong, especially in high tech. The world is changing so fast across every industry and endeavor that it's a given the role for which you're hiring is going to change. Yesterday's widget will be obsolete tomorrow, and hiring a specialist in such a dynamic environment can backfire. A specialist brings an inherent bias to solving problems that spawns from the very expertise that is his putative advantage, and may be threatened by a new type of solution that requires new expertise. A smart generalist doesn't have bias, so is free to survey the wide range of solutions and gravitate to the best one.

It is a painful thing to say to oneself: by choosing one road I am turning my back on a thousand others. Everything is interesting; everything might be useful; everything attracts and charms a noble mind; but death is before us; mind and matter make their demands; willy-nilly we must submit and rest content as to things that time and wisdom deny us, with a glance of sympathy which is another act of our homage to the truth.