“Furthermore, because man is in this relationship to God he is also in a state of enmity against himself. He is not only engaged in this warfare against a God who is outside of him;but he is also fighting a war within himself. Therein lies the real tragedy of fallen man; he does not believe what I am saying but it is certainly true of him. Man is in a state of internal conflict and he does not know why it is so. He wants to do certain things, but something inside him tells him that it is wrong to do so. He has something in him which we call conscience. Though he thinks he can be perfectly happy whatever he does, and though he may silence other people, he cannot silence this inward monitor. Man is in a state of internal warfare; he does not know the reason for it, yet he knows that it is so.
But in the Scriptures we are told exactly why this is the case. Man was made by God in such a way that he can only be at peace within himself when he is at peace with God. Man was never meant to be a god, but he is for ever trying to deify himself. He sets up his own desires as the rules and laws of his life, yet he is ever characterized by confusion, and worse. Something in himself denies his claims; and so he is always quarrelling and fighting with himself. He knows nothing of real peace; he has no peace with God, he has no peace within himself. And still worse, because of all this, he is in a state of warfare with everyone else. Unfortunately for him everyone else wants to be a god as well. Because of sin we have all become self-centred, ego-centric, turning in upon this self which we put on a pedestal, and which we think is so wonderful and superior to all others. But everyone else is doing the same, and so there is war among the gods. We claim that we are right, and that everyone else is wrong. Inevitably the result is confusion and discord and unhappiness between man and man. Thus we begin to see why the Apostle prays that we may have peace. It is because of man’s sad condition, man’s life as the result of sin, and as the result of his falling away from God. He is in a state of dis-unity within and without, in a state of unhappiness, in a state of wretchedness.”
—D. Martyn Lloyd-Jones, God’s Ultimate Purpose, (Baker Book House, 1979) pp. 38, 39