We trust in God alone.

 Ps 62 1 My soul finds rest in God alone; my salvation comes from him.What does the Psalmist mean when He rest in God? First he reasons that he has been saved into a Family in which God fights the Psalmist battles. Ps 21 1 O LORD, the king rejoices in your strength. How great is his joy in the victories you give!2 You have granted him the desire of his heart and have not withheld the request of his lips. "Selah"3 You welcomed him with rich blessings and placed a crown of pure gold on his head.4 He asked you for life, and you gave it to him-- length of days, for ever and ever. 5 Through the victories you gave, his glory is great; you have bestowed on him splendor and majesty. The Psalmist first of all wants to be respected. The only way that he can be respected is to be protected. Here the Psalmist is saying that its Gods battle and victory. Ps 20 7 Some trust in chariots and some in horses, but we trust in the name of the LORD our God. The Psalmist has been saved into Gods kingdom. This kingdom is represented by Gods name. The Psalmist is saying that he is only successful because God is upholding His own name. The Psalmist can be confident that Gods kingdom has already been established. 
The second reason is that when we are saved our old will is destroyed. In place of our old will we have a new set of desires. Speaking of himself the Psalmist declares Ps 21 2 You have granted him the desire of his heart and have not withheld the request of his lips. "Selah"What is this desire? To condense this teaching it is that we would be successful and overcome all opposition. In the same chapt 21 he goes on to express his desire 5 Through the victories you gave, his glory is great; you have bestowed on him splendor and majesty.God has given us a desire that reflects Gods desire...
27 8 My heart says of you, "Seek his face!" Your face, LORD, I will seek. In this context he is saying when we face opposition our new desires overcome all opposition 140  8 do not grant the wicked their desires, O LORD; do not let their plans succeed, or they will become proud. "Selah" So the Psalmist is saying that Gods kingdom has been established in our hearts and we express it in our desires in prayer. This kingdom has already been established so that we rest in the protection of Gods law and we are seen as being obedient. We rest by desiring to overcome all opposition because of the simple fact that we are protected by Gods upholding His own name. I will continue on this Ps 62