[Testimonies for the Church 4:587-591 (1881).]
In our institutions, where many are laboring together, the influence of association is very great. It is natural to seek companionship. Everyone will find companions or make them. And just in proportion to the strength of the friendship, will be the amount of influence which friends will exert over one another for good or for evil. All will have associates, and will influence and be influenced in their turn. CH 414.1
The link is a mysterious one which binds human hearts together, so that the feelings, tastes, and principles of two individuals are closely blended. One catches the spirit, and copies the ways and acts, of the other. As wax retains the figure of the seal, so the mind retains the impression produced by intercourse and association. The influence may be unconscious, yet it is no less powerful. CH 414.2
If the youth could be persuaded to associate with the pure, the thoughtful, and the amiable, the effect would be most salutary. If choice is made of companions who fear the Lord, the influence will lead to truth, to duty, and to holiness. A truly Christian life is a power for good. But, on the other hand, those who associate with men and women of questionable morals, of bad principles and practices, will soon be walking in the same path. The tendencies of the natural heart are downward. He who associates with the skeptic will soon become skeptical; he who chooses the companionship of the vile will most assuredly become vile. To walk in the counsel of the ungodly is the first step toward standing in the way of sinners and sitting in the seat of the scornful. CH 414.3