If however, in spite of all this, we are sometimes tempted to doubt whether the power of the truth which Christ represents is to win the mastery, or whether it is destined to be lost in the great struggle, we must remember that its authority is that of elements that are fundamental in human nature. The spiritual instincts may be repressed: they cannot be exterminated. As in every little creek and inlet along the shore the water answers to the call of the ocean, and feels the might of the outgoing and the incoming tide, so in human life deep answers unto deep. We must remember, too, that Christ is not a mere teacher. His power is not alone that of the truth he utters. It is no mere accident of history that the higher truth and life which we have been considering confront the age as Christian truth and life. They receive a power from their union with Christ which they could not have received, even had the thought of men attained to them, without this. We have looked at the external form of his life and at his teaching in their relation to the age. There is yet another step to take. There is still an inner reality to be unveiled. Behind the power of his teaching is the power of his personality. In this is found the climax of the antithesis in which he stands to the present. The tendency of the present age is, consciously or unconsciously, to disown personality. The laws which make the substance of its thought, the mechanism that makes the framework of its life, both tend to assert themselves against the power of a free personality. We may illustrate this by the modern method of warfare. In ancient times the victory depended on the strength of the individual arm and the courage of the individual heart. Now it depends more upon the drill of the army and the clear head of the general.