Whatever theories we may adopt concerning volition, or the governing determinations of the mind, all will agree in the fact, that the energies of the human soul, when aroused, may be strung like fibres of steel, giving and adamantine firmness and indomitable force to the will. We have seen this exemplified in the fortitude with which one sometimes endures surgical operation; in the heated courage of the soldier, rushing with the loud huzza into the very face of the engulphing battery; in the cool, calculating resolution which carries the unflinching column with steady tread into the very centre of bristling squares. All this is but the strength of will when the energies of the soul are stirred. Now one's resolution may and should become thus iron-like in the war with his own covetousness. He should determine in the strength of grace to break it down, however much it may cost. God has given us this power of will, and to him we are responsible for its proper exercise; ever remembering that it is strengthened by cultivation of reiterated effort. The raw recruit cannot be trusted at the post of danger like the veteran, who has repeatedly nerved up his spirit, till by habit it has become as unyielding as a rock. The latter has learnt to be brave. So we should learn to be soldiers in the war with selfishness, by perseveringly girding our minds to the deadly conflict.--Has depraved man such energy of will in spreading devastation and death; and shall not Christians exhibit as great force of resolution in diffusing the blessings of salvation? Who dare say, I cannot, or will not, exercise it? Let us be mindful of our obligations. If our minds may be wrought up to such invincible firmness and energy of resolution to do evil; surely, God assisting, they may not only be inspired with a lofty enthusiasm to resist the solicitations of selfishness, but also roused to a sublimity of generous emotions, to engage, like a Mills or a Howard, in disinterested and self-denying efforts for the good of others. III. We are now ready to take the last step in erecting a general system of beneficence, viz.: the carrying into effect right principles and well-directed resolutions. While, on the one hand, the intellectual and emotional qualities of the mind give character and vitality to action; on the other hand our conduct exerts a powerful reflex influence on the affections and purposes. Nothing tends more to give strength and spirit to a mental principle than accordant action; and nothing tends more to obliterate an emotion from the breast, or to paralyze a resolution, than the neglect of its appropriate manifestations. However deeply the one may be engraven on the soul, or however solid the texture or vigorous the life of the other, a few instances of neglect or violation will strike them with the chills of death.