Spiritual culture is attained through concentration. It must be continued daily and every moment to be of use. The "Elixir of Life" (_Five Years of Theosophy_) gives us some of the reasons for this truth. Meditation has been defined as "the cessation of active, external thought." Concentration is the entire life-tendency to a given end. For example, a devoted mother is one who consults the interests of her children and all branches of their interests in and before all things; not one who sits down to think fixedly about one branch of their interests all the day. Life is the great teacher; it is the great manifestation of Soul, and Soul manifests the Supreme. Hence all methods are good, and all are but parts of the great aim, which is Devotion. "Devotion is success in actions," says the _Bhagavad-Gîtâ_. We must use higher and lower faculties alike, and beyond those of mind are those of the Spirit, unknown but discoverable. The psychic powers, as they come, must also be used, for they reveal laws. But their value must not be exaggerated, nor must their danger be ignored. They are more subtle intoxicants than the gross physical energies. He who relies upon them is like a man who gives way to pride and triumph because he has reached the first wayside station on the peaks he has set out to climb. Like despondency, like doubt, like fear, like vanity, pride, and self-satisfaction, these powers too are used by Nature as traps to detain us. Every occurrence, every object, every energy may be used for or against the great end: in each Nature strives to contain Spirit, and Spirit strives to be free. Shall the substance paralyze the motion, or shall the motion control the substance? The interrelation of these two is manifestation. The ratio of activity governs spiritual development; when the great Force has gained its full momentum, It carries us to the borders of the Unknown. It is a Force intelligent, self-conscious, and spiritual: its lower forms, or vehicles, or correlates may be evoked by us, but Itself comes only of Its own volition. We can only prepare a vehicle for It, in which, as Behmen says, "the Holy Ghost may ride in Its own chariot." "The Self cannot be known by the _Vedas_, nor by the understanding, nor by much learning. He whom the Self chooses, by him alone the Self can be gained." "The Self chooses him as his own. But the man who has not first turned aside from his wickedness, who is not calm and subdued, _or whose mind is not at rest_, he can never obtain the Self, even by knowledge." The italics are mine; they indicate the value of that stage of contemplation hitherto referred to as that in which the mind has ceased to energize, and when the pure energies of Nature go to swell the fountain of Spirit.