The defects of the ancient scientific method are not wanting in him. Generalising from a few superficial instances, reasoning _a priori_, instead of winning his way by observation and comparison up to the Universal truth, fancying that it was possible for a single mind to grasp, and for a system by a few bold hypotheses to explain, the problem of external nature, of the soul, of the existence of the gods: such are the obvious defects which Lucretius shares with his masters, and of which the experience of ages has taught us the danger as well as the charm. But the atomic system has features which render it specially interesting at the present day. Its materialism, its attribution to nature of power sufficient to carry out all her ends, its analysis of matter into ultimate physical _individua_ incognisable by sense, while yet it insists that the senses are the fountains of all knowledge, [62] are points which bring it into correspondence with hypotheses at present predominant. Its theory of the development of society from the lower to the higher without break and without divine intervention, and of the survival of the fittest in the struggle for existence, its denial of design and claim to explain everything by natural law, are also points of resemblance. Finally, the lesson he draws from this comfortless creed, not to sit with folded hands in silent despair, nor to "eat and drink for to-morrow we die," but to labour steadily for our greater good and to cultivate virtue in accordance with reason, equally free from ambition and sloth, is strikingly like the teaching of that scientific school [63] which claims for its system a motive as potent to inspire self-denial as any that a more spiritual philosophy can give.