In verse 2 David calls Him our Rock. He is implying a foundation, a source of stability that keeps us from undirected anxiety, just running all over the place, not knowing what we are doing. Also in verse 2 he says He is our defense, or our defender. God has ways of deflecting attacks that no human being can. Also in verse 7 He is our refuge meaning an unqualified place of safety in any circumstance. It does not matter what it is. The Hebrew shows us in this one psalm that five times in this brief 12-verse psalm he exhorts himself, or instructs us, that God is the only sure place of refuge. Now how is it that God can do all these things? He is our Rock, our Salvation, our Defender, our Refuge, and our Glory, because, as David says quite simply in verse 11, Power belongs to God. It is right here that we are confronted with a major reason why God is the only One who can be fully relied upon in our time of need. Power is not only something God possesses, but when we come to understand it, ALL power belongs to Him! All power flows from Him, and He gives it to whomsoever He wills. Power is God's possession to use in any situation, no matter what it might be, and distributed as He sees fit. There is no help like Him anywhere, because power belongs to Him. Is there any area of life; is there any need that He is not superior to any source that we might possibly seek out to provide help during our time of need? So David is suggesting to us that whenever you are in trouble and need help, why not just go right to the top? This entire Psalm 62 is a brief general instruction explaining why we should trust God. In a broad way, David is saying that God's power to act in behalf of His purposes is the very foundation of our faith in Him.