Psalms 139:13

We cannot see God, but he can see us. The psalmist did not desire to go from the Lord. Whither can I go? In the most distant corners of the world, in heaven, or in hell, I cannot go out of thy reach. No veil can hide us from God; not the thickest darkness. No disguise can save any person or action from being seen in the true light by him. Secret haunts of sin are as open before God as the most open villanies. On the other hand, the believer cannot be removed from the supporting, comforting presence of his Almighty Friend. Should the persecutor take his life, his soul will the sooner ascend to heaven. The grave cannot separate his body from the love of his Saviour, who will raise it a glorious body. No outward circumstances can separate him from his Lord. While in the path of duty, he may be happy in any situation, by the exercise of faith, hope, and prayer.

For thou hast possessed my reins. Thou art the owner of my inmost parts and passions: not the indweller and observer only, but the acknowledged lord and possessor of my most secret self. The word "reins" signifies the kidneys, which by the Hebrews were supposed to be the seat of the desires and longings; but perhaps it indicates here the most hidden and vital portion of the man; this God doth not only inspect, and visit, but it is his own; he is as much at home there as a landlord on his own estate, or a proprietor in his own house. Thou hast covered me in my mother's womb. There I lay hidden —covered by thee. Before I could know thee, or aught else, thou hadst a care for me, and didst hide me away as a treasure till thou shouldest see fit to bring me to the light. Thus the Psalmist describes the intimacy which God had with him. In his most secret part —his reins, and in his most secret condition —yet unborn, he was under the control and guardianship of God.