It is a kind of mental agitation against one thing a person met with in life which was wrong, which makes him see wrong in everything. A person who has once burnt his lips drinking hot milk blows the buttermilk to cool it before he drinks. The human mind is like a compass; if it is once made to point out wrong, whatever way you may take it, it will seek its own point all the time. So it is with the doubting person. A person who begins to doubt his enemy next doubts his friend, then he comes to doubt his nearest and dearest friends in life, he cannot make his mind trust anybody in the world. With the best motive one may approach him, in every way one may show him sympathy, he will still think, "perhaps in this sympathy there is hidden an enmity." It is generally the case with human beings that their attitude becomes fixed; it is not a rare thing, seldom met with. But the one who trusts will trust everyone and under all conditions, and who idealizes and sees good will see good in, and will idealize, even undeserving ones.