God's Kingdom is "present in its beginnings, but still future in its fullness. This guards us from an under-realized eschatology (expecting no change now) and an over-realized eschatology (expecting all change now). In this stage, we embrace the reality that while we're not yet what we will be, we're also no longer what we used to be.
Timothy KellerLife in this fallen world is to a great degree meaningless, our aspirations are constantly being frustrated, and sometimes the respectable people are oppressive and bigoted. And yet there is a Good that will triumph over Evil in the end. From a Christian perspective the problem with both kinds of stories is that they tend to blame problems on things besides sin and identify salvation in things besides God — and therefore are ultimately too simplistic.
Timothy KellerIf a person has grasped the meaning of God's grace in his heart, he will do justice. If he doesn't live justly, then he may say with his lips that he is grateful for God's grace, but in his heart he is far from him. If he doesn't care about the poor, it reveals that at best he doesn't understand the grace he has experienced, and at worst he has not really encountered the saving mercy of God. Grace should make you just.
Timothy Keller