_Vague Intellectual Pleasure._--Fig. 18 represents a vague cloud of the same order as those shown in Figs. 8 and 14, but in this case the colour is yellow instead of crimson or blue. Yellow in any of man's vehicles always indicates intellectual capacity, but its shades vary very much, and it may be complicated by the admixture of other hues. Generally speaking, it has a deeper and duller tint if the intellect is directed chiefly into lower channels, more especially if the objects are selfish. In the astral or mental body of the average man of business it would show itself as yellow ochre, while pure intellect devoted to the study of philosophy or mathematics appears frequently to be golden, and this rises gradually to a beautiful clear and luminous lemon or primrose yellow when a powerful intellect is being employed absolutely unselfishly for the benefit of humanity. Most yellow thought-forms are clearly outlined, and a vague cloud of this colour is comparatively rare. It indicates intellectual pleasure--appreciation of the result of ingenuity, or the delight felt in clever workmanship. Such pleasure as the ordinary man derives from the contemplation of a picture usually depends chiefly upon the emotions of admiration, affection, or pity which it arouses within him, or sometimes, if it pourtrays a scene with which he is familiar, its charm consists in its power to awaken the memory of past joys. An artist, however, may derive from a picture a pleasure of an entirely different character, based upon his recognition of the excellence of the work, and of the ingenuity which has been exercised in producing certain results. Such pure intellectual gratification shows itself in a yellow cloud; and the same effect may be produced by delight in musical ingenuity, or the subtleties of argument. A cloud of this nature betokens the entire absence of any personal emotion, for if that were present it would inevitably tinge the yellow with its own appropriate colour. [Illustration: FIG. 18. VAGUE INTELLECTUAL PLEASURE]