It is impossible for Jehovah to do wrong, to deceive anyone, to have any ethical or moral defects. He is Himself His own standard of conduct, and the standard for all created beings.

 Rather, “justice” (RSV; cf. Isa. 61:8). All of God’s dealings are consistent with His righteous nature. His decisions are irreproachable, and His ways with all created beings are without fault. He is indeed “a God of judgment” (Isa. 30:18).

God never leaves His work unfinished or imperfect. He will carry through the plan of salvation to its perfect end.

 This occurs some 30 times in the OT as a descriptive title for Christ, King and Leader of the Hebrew theocracy. Here is the first instance of its use in reference to Jehovah (see also vs. 15, 18, 30, 31). Compare Hannah’s use of it in 1 Sam. 2:2; David’s in Ps. 18:2, 31, 46; 19:14 (where “my strength” is literally “my rock”); 28:1; 62:2, 7; and many others. The final instance of its use in the OT is in Hab. 1:12, where “O mighty God” literally reads, “O Rock.”

 The solid rock, the towering mountain, the range of hills, are suggestive of many of God’s attributes. His eternity is thought of in terms of the eternal hills (see Ps. 90:2). The impregnability of the castle with its towers on the mountaintop is a symbol of the unassailable defense of God, and of His care for His children (see Ps. 18:2; Dan. 2:35). The Lord is also depicted under the same figure as a safe dwelling place, a shelter and a shade (see Ps. 90:1; Isa. 32:2), and again, as the foundation upon which the church rests (Matt. 16:18; 1 Cor. 3:11), and upon which the individual Christian is to build his house of faith (Matt. 7:24).

Jehovah is the only true Rock. The mountains are a symbol of His unswerving faithfulness, His changeless character, and His loyalty to the church and to its individual members. The word “rock” is never applied to men.

The word “truth” here does not refer to true doctrine, that is, to a body of beliefs. Rather it refers to “faithfulness” as a principle. He is a God who is true to Himself, who acts in harmony with His own divine attributes. The word is from the verb “to be sure,” “to be firm.”