Paradoxically, the simpler poetry is, the more difficult it becomes for a critic to discuss intelligently. Trained to explicate, the critic often loses the ability to evaluate literature outside the critical act. A work is good only in proportion to the richness and complexity of interpretations it provokes.
That is the way convince people. Or change them and prevent them from hurting whether themselves and others. Art is the most effective form of communication. You can use it to lift the human spirit and make them understand that there is more to life than their next drug use.