Charles H. Spurgeon on Psalms 118:14

The LORD my strength and song, my strength while I was in the conflict, my song now that it is ended; my strength against the strong, and my song over their defeat. He is far from boasting of his own valour; he ascribes his victory to its real source, he has no song concerning his own exploits, but all his peans are unto Jehovah Victor, the Lord whose right hand and holy arm had given him the victory. And is become my salvation. The poet warrior knew that he was saved, and he not only ascribed that salvation unto God, but he declared God himself to be his salvation. It is an all comprehending expression, signifying that from beginning to end, in the whole and in the details of it, he owed his deliverance entirely to the Lord. Thus can all the Lord's redeemed say, "Salvation is of the Lord." We cannot endure any doctrine which puts the drown upon the wrong head and defrauds the glorious King of his revenue of praise. Jehovah has done it all; yea; in Christ Jesus he is all, and therefore in our praises let him alone be extolled. It is a happy circumstance for us when we can praise God as alike our strength, song, and salvation; for God sometimes gives a secret strength to his people, and yet they question their own salvation, and cannot, therefore, sing of it. Many are, no doubt, truly saved, but at times they have so little strength, that they are ready to faint, and therefore they cannot sing: when strength is imparted and salvation is realised then the song is clear and full.