It is in the _Epistles_ that Horace reveals himself most intimately, and perhaps with the most subtle charm. But the great work of his life, for posterity as well as for his own age, was the three books of _Odes_ which were published by him in 23 B.C., at the age of forty-two, and represent the sustained effort of about ten years. This collection of eighty-eight lyrics was at once taken to the heart of the world. Before a volume of which every other line is as familiar as a proverb, which embodies in a quintessential form that imperishable delight of literature to which the great words of Cicero already quoted[7] give such beautiful expression, whose phrases are on all men's lips as those of hardly any other ancient author have been, criticism is almost silenced. In the brief and graceful epilogue, Horace claims for himself, with no uncertainty and with no arrogance, such eternity as earth can give. The claim was completely just. The school-book of the European world, the _Odes_ have been no less for nineteen centuries the companions of mature years and the delight of age--_adolescentiam agunt, senectutem oblectant,_ may be said of them with as much truth as ever now. Yet no analysis will explain their indefinable charm. If the so-called "lyrical cry" be of the essence of a true lyric, they are not true lyrics at all. Few of them are free from a marked artificiality, an almost rigid adherence to canon. Their range of thought is not great; their range of feeling is studiously narrow. Beside the air and fire of a lyric of Catullus, an ode of Horace for the moment grows pale and heavy, _cineris specie decoloratur_. Beside one of the pathetic half-lines of Virgil, with their broken gleams and murmurs as of another world, a Horatian phrase loses lustre and sound. Yet Horace appeals to a tenfold larger audience than Catullus--to a larger audience, it may even be said, than Virgil. Nor is he a poets' poet: the refined and exquisite technique of the _Odes_ may be only appreciable by a trained artist in language; but it is the untrained mind, on whom other art falls flat, that the art of Horace, by some unique penetrative power, kindles and quickens. His own phrase of "golden mediocrity" expresses with some truth the paradox of his poetry; in no other poet, ancient or modern, has such studied and unintermitted mediocrity been wrought in pure gold. By some tact or instinct--the "felicity," which is half of the famous phrase in which he is characterised by Petronius--he realised that, limited as his own range of emotion was, that of mankind at large was still more so, and that the cardinal matter was to strike in the centre. Wherever he finds himself on the edge of the range in which his touch is certain, he draws back with a smile; and so his concentrated effect, within his limited but central field, is unsurpassed, and perhaps unequalled.