first to bring our minds into a condition of equilibrium which will enable us to consciously direct the flow of spirit to a definitely recognized purpose, and then carefully to guard our thoughts from inducing a flow in the opposite direction. We must always bear in mind that we are dealing with a wonderful potential energy which is not yet differentiated into any particular mode, and that by the action of our mind we can differentiate it into any specific mode of activity that we will; and by keeping our thought fixed on the fact that the inflow of this energy is taking place and that by our mental attitude we are determining its direction, we shall gradually realize a corresponding externalization. Proper concentration, therefore, does not consist of strenuous effort which exhausts the nervous system and defeats its own object by suggesting the consciousness of an adverse force to be fought against, and thus creating the adverse circumstances we dread; but in shutting out all thoughts of a kind that would disperse the spiritual nucleus we are forming and dwelling cheerfully on the knowledge that, because the law is certain in its action, our desire is certain of accomplishment. The other great principle to be remembered is that concentration is for the purpose of determining the quality we are going to give to the previously undifferentiated energy rather than to arrange the specific circumstances of its manifestation. That is the work