19. It is the same in assemblies of incarnated beings. An assembly of people is a focus whence radiate diverse thoughts. An assembly of persons is, like an orchestra, a choir of thoughts, where each one produces his note. The result is a multitude of fluidic-flowing effluvia, of which each one receives the impression of the sounds by the spiritual sense, like in a music choir each one receives the impression of the sound through the sense of hearing.
But, as there are harmonious or discordant sounds, there are also harmonious or discordant thoughts. If all is harmonious, the impression is agreeable; if otherwise, painful. There is no need for the thought to be formed into words. The fluidic-radiation exists all the same, whether it is expressed or not.
Such is the cause of the sentiment of satisfaction that is experienced in a sympathetic reunion, animated by good and benevolent thoughts. It reigns there like a salubrious moral atmosphere, which one breathes with ease. One is strengthened there, because it is impregnated with salutary fluidic effluvia; but, if some evil thoughts are mingled with it, they produce the effect of a current of icy air in a warm atmosphere or of a wrong key note played in a concert. Thus is explained also the anxiety, the indefinable uneasiness, that one feels in antipathetically surroundings, where malevolent thoughts are called forth like currents of nauseous air.