I [am] a stranger in the earth: hide not thy commandments from me.
Ver. 19. I am a stranger in the earth] And therefore apt to lose my way, without a guide; I shall surely else be wildered and lost.
Hide not thy commandments from me] viz. In the spiritual sense and effectual operation of them. Philosophers observe, that lumen est vehiculum influentiae, light is the convoy of influence; as it begets the flower in the field, the pearl in the earth, &c., so the foundation of all renovation is illumination; hence David so earnestly beggeth it here, and Psalms 119:17 .