'Well, the most remarkable thing about him was how he would sit down to work out everything that might conceivably happen to him in the next ten years, and then make plans in advance. There is nothing that most people find harder to understand than that a man can continuously scheme to meet all the contingencies that might occur five years ahead. The word used for this is opportunism. But very few people are genuinely opportunists. It takes not only clarity of mind about oneself, which is fairly common; but a stubborn and driving energy, which is rare.'
_ doris lessing. the golden notebook. 1962