The kingdom is established in our hearts

Ps 9 10 Those who know your name will trust in you, for you, LORD, have never forsaken those who seek you. 

Our success is dependent upon Gods covenant love.  The Psalmist declares that God will never forsake us. The reason that we cannot be forsake is because everything that God has created is good. Our salvation was not just a gift given to us but it was God placing us new spiritual kingdom in which Christ rules by His word. This is how the Psalmist describes Christ authority.
2" I will be glad and rejoice in you; I will sing praise to your name, O Most High." The Most High is a term used for Christ absolute and unhindered exercise of His will over all creatures. Even tho the Psalmist is a finite creature who is constrained by time and place yet he is connected to the universal created work of Christ that is gifted to him through his renewed desires. 4" For you have upheld my right and my cause; you have sat on your throne, judging righteously." In declaring that this kingdom lives inside, the Psalmist is expressing his total dependence on God as the authority that unifies the Psalmist desire with Gods universal purposes. He is teaching that even tho this desire is encased by corruption yet it contains all the words of Christ in His creation and recreation that mysteriously orders all things. 6" Endless ruin has overtaken the enemy, you have uprooted their cities; even the memory of them has perished.7 The LORD reigns forever; he has established his throne for judgment. 8 He will judge the world in righteousness; he will govern the peoples with justice."

In declaring the authority of Gods word the Psalmist is pronouncing Gods order over the corruption of his present experience. If God has upheld these renewed desires by the pronouncement of absolute authority over all things in the Psalmist mind he has brought the future into the present. In order for the Psalmist to be confident in God working through his desires he must visit the future kingdom through Gods pronouncement and unite it with his present experience. In this way as the present passes into the future these words create in his mind as overcoming all opposition. 11" Sing praises to the LORD, enthroned in Zion; proclaim among the nations what he has done."

Since the Psalmist has shown his dependence upon God in his accurate description of the authority of Gods word and Gods kingdom that is established in the nature of the Psalmist he now distances himself from the intrinsic value that it give him. The Psalmist identifies with the poor and the oppressed.  9 The LORD is a refuge for the oppressed, a stronghold in times of trouble." He is acknowledging that even tho God has gifted him with a full salvation in which the future is always coming into the present yet salvation is also an ongoing sequence of overcoming one opposition to another.13 " O LORD, see how my enemies persecute me! Have mercy and lift me up from the gates of death,14 that I may declare your praises in the gates of the Daughter of Zion and there rejoice in your salvation."

God performs His secret work in the Psalmist by creating victory and declaring it in the Psalmist heart. He is saying that as he pronounces Gods word in his meditation he wants God to visit him with the experience of the future kingdom when he experiences victory so that he can put a stake in the ground as a remembrance. The Psalmist lives through a spiritual vision of the future as he experiences victories like being with child. He goes through a creation of a consensus that is favorable to his purposes so that when they are united to victory in the birthing process he gloats as if he is the hope of the poor and the oppressed as they are freed through the victory. 18 " But the needy will not always be forgotten, nor the hope of the afflicted ever perish."