"It is Karma, or our old acts, that bring us back into earthly life. The spirit's abode changes according to its Karma, and this Karma forbids any long continuance in one condition, because it is always changing. So long as action is governed by material and selfish motives, just so long must the effect of that action be manifested in physical rebirths. Only the perfectly selfless man can elude the gravitation of material life. Few have attained this, but it is the goal of mankind." The danger of a too brief explanation of the law of Causality consists in the possibility of being imperfectly understood, and consequently of favouring the doctrine of fatalism. "Why act at all, the objection will be urged, if everything is foreseen by the Law? Why stretch out a hand to the man who falls into the water before our very eyes? Is not the Law strong enough to save him, if he is not to die; and if he is, have we any right to interfere?... "Such reasoning arises from ignorance and egoism. "Yes, the law is powerful enough to prevent the man from drowning, and also to prevent the possibility of his being saved by some passer-by, who has been moved to pity by the sight; to doubt this were to doubt the power of God. In the work of evolution, however, God does more than supply man with means of developing his intelligence; in order to enrich his heart, he offers him opportunities of sacrificing himself. Again, the innumerable problems set by duty are far from being solved for us; with difficulty can we distinguish a crime from a noble action; very often we do wrong, thinking we are doing right, and it not unfrequently happens that good results from our evil deeds; this is why God sends us experiences which are to teach us our duty. "The soul learns not only during its incarnations, but even more after leaving the body,[32] for life after death is largely spent in examining the consequences of deeds performed during life on earth. "Whenever, then, an opportunity for action offers itself, let us follow the impulse of the heart, the cry of duty, and not the sophisms of the lower nature, the selfish "ego," the cold brain, which knows neither compassion nor devotion. Do your duty, whatever happens, says the Law, _i.e._, do not allege, as your excuse for being selfish, that God, if He thinks it best, will help your brother in his trouble; why do you not fling yourself into the fire, with the thought that, if your hour has not yet come, God will prevent the flames from burning you? Does not the man, who commits suicide, himself push forward the hand on the dial of life, setting it at the fatal hour?