Psalms 118:9

In princes - Men of high estate are generally proud, vainglorious, self-confident, and rash: it is better to trust in God than in them. Often they cannot deliver, and often they will not when they can. However, in the concerns of our salvation, and in matters which belong to Providence, they can do nothing.

It is better ... than to put confidence in princes - Even in the most mighty of the human race; in those who of all people may be supposed to have the most ability to aid us; in those whose favor is often sought more than the favor of God. Princes are only men; often as faithless and deceitful as other men; often less reliable in their character than those in more humble life. and in the great matters where we most need aid - in sickness, in danger, in death, in the eternal world - as absolutely powerless as men in the lowest condition of poverty, or in the most humble rank.