The horse is not endowed with the spiritual aptitude for servile dependence in the same measure as the dog; but he ministers effectually to his master's impulse to convert the "animate" forces of the environment to his own use and discretion and so express his own dominating individuality through them.

The fast horse is at least potentially a race-horse, of high or low degree; and it is as such that he is peculiarly serviceable to his owner.

The utility of the fast horse lies largely in his efficiency as a means of emulation; it gratifies the owner's sense of aggression and dominance to have his own horse outstrip his neighbor's.

This use being not lucrative, but on the whole pretty consistently wasteful, and quite conspicuously so, it is honorific, and therefore gives the fast horse a strong presumptive position of reputability.

Beyond this, the race-horse proper has also a similarly non-industrial but honorific use as a gambling instrument.
The fast horse, then, is aesthetically fortunate, in that the canon of pecuniary good repute legitimates a free appreciation of whatever beauty or serviceability he may possess.