In the spiritual world, also, the subtle influences which form and transform the soul are Heredity and Environment. And here especially where all is invisible, where much that we feel to be real is yet so ill-defined, it becomes of vital practical moment to clarify the atmosphere as far as possible with conceptions borrowed from the natural life. Few things are less understood than the conditions of the spiritual life. The distressing incompetence of which most of us are conscious in trying to work out our spiritual experience is due perhaps less to the diseased will which we commonly blame for it than to imperfect knowledge of the right conditions. It does not occur to us how natural the spiritual is. We still strive for some strange transcendent thing; we seek to promote life by methods as unnatural as they prove unsuccessful; and only the utter incomprehensibility of the whole region prevents us seeing fully--what we already half-suspect--how completely we are missing the road. Living in the spiritual world, nevertheless, is just as simple as living in the natural world; and it is the same kind of simplicity. It is the same kind of simplicity for it is the same kind of world--there are not two kinds of worlds. The conditions of life in the one are the conditions of life in the other. And till these conditions are sensibly grasped, as the conditions of all life, it is impossible that the personal effort after the highest life should be other than a blind struggle carried on in fruitless sorrow and humiliation. Of these two universal factors, Heredity and Environment, it is unnecessary to balance the relative importance here. The main influence, unquestionably, must be assigned to the former. In practice, however, and for an obvious reason, we are chiefly concerned with the latter. What Heredity has to do for us is determined outside ourselves. No man can select his own parents. But every man to some extent can choose his own Environment. His relation to it, however largely determined by Heredity in the first instance, is always open to alteration. And so great is his control over Environment and so radical its influence over him, that he can so direct it as either to undo, modify, perpetuate or intensify the earlier hereditary influence within certain limits. But the aspects of Environment which we have now to consider do not involve us in questions of such complexity. In what high and mystical sense, also, Heredity applies to the spiritual organism we need not just now inquire. In the simpler relations of the more external factor we shall find a large and fruitful field for study.