Charles H. Spurgeon on Psalms 118:6

The LORD is on my side. The reason which the Psalmist gives here for his trusting, or for his not fearing, is the great fact, that the Lord is on his side; and the prominent idea which this brings before us is Alliance; the making common cause, which the great God undoubtedly does, with imperfect, yet with earnest, trusting man. We know very well the great anxiety shown by men, in all their worldly conflicts, to secure the aid of a powerful ally; in their lawsuits, to retain the services of a powerful advocate; or, in their attempts at worldly advancement, to win the friendship and interest of those who can further the aims they have in view. When Herod was highly displeased with the armies of Tyre and Sidon, they did not venture to approach him until they had made Blastus, the king's chamberlain, their friend. If such and such a person be on their side, men think that all must go well. Who so well off as he who is able to say, The LORD is on my side? Philip Bennet Power, in "The I Will's of the Psalms," 1861.