The development of the ego often obscures this faculty, in the same way that clouds eclipse the sun. Therefore a selfish person, however clever, lacks pure intelligence and is therefore deficient in the true sense of justice. It is often personal feeling, a personal like or dislike, that disposes the weights in the scales of justice to suit the personal fancy. Therefore often a person who boasts of his sense of justice is really more unjust than one who makes no such claim. A just person is one who can decide against his own interest if necessary. Only when personal bias is absent can a decision be called just.