"Through God we shall do valiantly, and it is He who will tread down our adversaries."In this Psalm, David says much about God rejecting him and his people (vs 1&10). He speaks of God being angry with him and God making things difficult for him and his people (vs 3). And then the final verse suddenly appears amidst all of this negative talk about the situation. How is David able to draw this sort of conclusion based on what is happening in his life as he writes this Psalm? I think it may be due to his trust in God.
David understands something very important. If God withdraws His favor, any supposed strength which is in himself will soon fail. The meaning behind the phrase, 'Through God we shall do valiantly' is that those whose sufficiency comes from God alone are prepared to do battle against any difficulty.
Let us consider the implications of having this sort of an attitude in our fight against sin in our own lives. Remember, 'if you are living according to the flesh, you must die; but if by the Spirit you are putting to death the deeds of the body, you will live.' Through God we shall do valiantly, and it is He who will tread down our adversaries.