May 1

To this attitude of goodwill, of forebearance and genuine kindness to all, must be added, however, constant but unprovocative vigilance, lest unrestricted association with the peoples of the world should enable the very few who have been definitely pronounced by the Master as injurious to the body of the Cause, to make a breach in the Movement. Not until, however, an unmistakable evidence should appear, manifestly revealing the evil motives of a certain individual or groups of individuals, is it advisable to make the matter public; for an untimely declaration that shall give rise to open differences among the friends is far more detrimental than forbearing still further with those who are suspected of evil intentions. As the Master so fully and consistently did throughout His lifetime, we must all make a supreme effort to pour out a genuine spirit of kindness and hopeful love to peoples of various creeds and classes, and must abstain from all provocative language that may impede the effect of what true and continued kindness can produce. 
- Shoghi Effendi  (From a letter dated 5 March 1922)