481 The testing of good men by calamities and evil men by leaving them in the environment of good things is part of the Universal Plan, in which some freedom of choice is left to man. The psychological and subjective test is unfailing, and the separation is effected partly by the operation of the human wills, to which some freedom is allowed. But it must be effected, if only in the interests of the good. 482 Man in his weak state would be most miserable if he could see the secrets of the future or the secrets of the Unseen. But things are revealed to him from time to time as may be expedient for him, by Messengers chosen for the purpose. Our duty is to hold fast by faith and lead a good life.