Only where we do anything ‘from the heart’ are we doing it with our whole being. This is the case because man essentially has been created, not for thought, but for loving. In love alone, which includes the right kind of thinking, is man wholly himself. In love – whether of the right or the wrong kind – his life is decided. Far truer than the one statement, “Man is what he thinks,” is the other statement, “Man is what he loves.” His loving and his hating, what he values and what he loathes, decide his life. In love, thinking, willing, and feeling are one. But again this is true only where man is “integrated,” where he is undivided, where he is whole; but in sin he is divided, there the heart is separated from reason. The unredeemed man has two centers, one of reason and the other of love: “head” and “heart” are divided. But from the point of view of the doctrine of man, faith consists precisely in the fact that the heart and the reason again become one, that the reason becomes warmed, and the heart becomes rational. For in faith man receives the right sort of love, the love with which God calls him into life and makes him His son, the love which gives to man his divine and his human thou, agape. In agape alone is man wholly integrated; without it he loves unreasonably and he reasons lovelessly.
– Emil Brunner, Revelation and Reason
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