In letters written by or on behalf of Shoghi Effendi much guidance is given related to this matter. But these traits cannot be acquired unless every believer makes a daily effort to gain them. They should not content themselves merely with relative distinction and excellence. Rather they should fix their gaze upon nobler heights by setting the counsels and exhortations of the Pen of Glory as their supreme goal. There is nothing that brings success in the Faith like service.
Service is the magnet which draws the divine confirmations.
Tests set the wheel in motion. They are conditions of imbalance requiring increased knowledge, love or service to bring about balance or a controlled, comfortable movement. This balance can be achieved by moving further out or further in on the various axis. To move outward is to respond with increased knowledge, love and service. To move back is to choose to regress toward the ego in these areas.