Charles H. Spurgeon on Psalms 119:25

My soul cleaveth to the dust, etc. In this verse, David hath a complaint; "My soul cleaveth to the dust"; and a prayer; Quicken thou me according to thy word. The prayer, being well considered, shall teach us the meaning of the complaint; that it was not, as some think, any hard bodily estate which grieved him, but a very sore spiritual oppression (as I may call it), bearing down his soul; that where he should have mounted up toward heaven, he was pressed down to the earth, and was so clogged with earthly cogitations, or affections, or perturbations, that he could not mount up. His particular temptation he expresses not; for the children of God many times are in that estate that they cannot tell their own griefs, and sometimes so troubled, that it is not expedient, albeit they might, to express them to others.

And hereof we learn, how that which the worldling counts wisdom, to the Christian is folly; what is joy to the one, is grief to the other. The joy of a worldling is to cleave unto the earth; when he gripes it surest, he thinks himself happiest, for it is his portion: to take heed to his worldly affairs, and have his mind upon them (in his estimation) is only wisdom. For the serpent's curse is upon him, he creeps on the earth, and licks the dust all the days of his life. This is the miserable condition of the wicked, that even their heavenly soul is become earthly. Qui secundum corporis appetentiam vivit caro est, etiam anima eorum caro est; as the Lord spake of those who perished in the Deluge, that they were but flesh, no spirit in them; that is, no spiritual or heavenly motion.

But the Christian, considering that his soul is from above, sets his affection also on those things which are above: he delights to have his conversation in heaven; and it is a grief to him when he finds his motions and affections drawn down and entangled with the earth. His life is to cleave to the Lord; but it is death to him when the neck of his soul is bowed down to the yoke of the world. William Cowper.