Special significance is given to this reference by the age of those who composed the gathering. This period embraces the years during which sexual maturity is attained, and the organism experiences important physiological and psychological changes. The consequence is that the atmosphere is, so to say, charged with unsuspected sex feeling, and it is not surprising that many complaints have been made of immorality following such gatherings. The organism is then peculiarly liable to suggestion in all forms. Along with the imitativeness of early years there is something of the decisive initiative of maturity. These qualities wisely guided might be turned to the great advantage of both the individual and of the community. Mere incitement by religious revivalism can result in little else than misdirection and injury. It should be the most obvious of truths that the attractiveness of hymns such as the one given, with the keen delight in the suggested pictures, lies in their yielding--all unknown, perhaps, to those participating-- satisfaction to feelings that are very frequently imperious in their demands, and are at all times astonishingly pervasive in their influence. Much valuable light is thrown upon this aspect of the subject by a study of human behaviour under the influence of actual disease. Of late years much useful work has been done in this direction, and our knowledge of normal psychology greatly helped by a study of abnormal mental states.[117] This is mainly because in disease we are able to observe the operation of tendencies that are unobscured by the restraints and inhibitions created by education and social convention. And one of the most striking, and to many startling, things observed is the close relation existing between erotic mania and religious delusion. The person who at one time feels himself under direct religious inspiration, or who imagines himself to be the incarnation of a divine personage, will at another time exhibit the most shocking obscenity in action and language. Sir T. S. Clouston furnishes a very striking case of this character, which he cites in order to show "the common mixture of religious and sexual emotion."[118] I do not reproduce it here because of its grossly obscene character; but, save for coarseness of language, it does not differ materially from illustrations already given. Almost any of the text-books will supply cases illustrating the connection between sexualism and religion, a connection generally recognised as the opinions cited already clearly show.