In a former lecture in this Institution, I said that the human race owed more to the eighteenth century than to any century since the Christian era. It may seem a bold assertion to those who value duly the century which followed the revival of Greek literature, and consider that the eighteenth century was but the child, or rather grandchild, thereof. But I must persist in my opinion, even though it seem to be inconsistent with my description of the very same era as one of decay and death. For side by side with the death, there was manifold fresh birth; side by side with the decay there was active growth;--side by side with them, fostered by them, though generally in strong opposition to them, whether conscious or unconscious. We must beware, however, of trying to find between that decay and that growth a bond of cause and effect where there is really none. The general decay may have determined the course of many men's thoughts; but it no more set them thinking than (as I have heard said) the decay of the Ancien Regime produced the new Regime--a loose metaphor, which, like all metaphors, will not hold water, and must not be taken for a philosophic truth. That would be to confess man--what I shall never confess him to be--the creature of circumstances; it would be to fall into the same fallacy of spontaneous generation as did the ancients, when they believed that bees were bred from the carcass of a dead ox. In the first place, the bees were no bees, but flies--unless when some true swarm of honey bees may have taken up their abode within the empty ribs, as Samson's bees did in that of the lion. But bees or flies, each sprang from an egg, independent of the carcass, having a vitality of its own: it was fostered by the carcass it fed on during development; but bred from it it was not, any more than Marat was bred from the decay of the Ancien Regime. There are flies which, by feeding on putridity, become poisonous themselves, as did Marat: but even they owe their vitality and organisation to something higher than that on which they feed; and each of them, however, defaced and debased, was at first a "thought of God." All true manhood consists in the defiance of circumstances; and if any man be the creature of circumstances, it is because he has become so, like the drunkard; because he has ceased to be a man, and sunk downward toward the brute.