The “already / but not yet,” fallacy. The basic meaning of this phrase is not a fallacy, but the way it is used makes it a fallacy. As Vincent points out, it is more often used to hold back things God has promised to give us now. Consider how Jesus response to Martha about the resurrection. Martha refers to the resurrection (and by implication, its power to effect reality) as for the future. Yet, Jesus responds to the resurrection and its power over reality as in the present tense. This application of knowledge is like how Jesus deduced the doctrine of resurrection from the Old Testament, “I am the God of Abraham and Isaac,” as the present tense. Jesus in this case, categorically says, “I am the resurrection of life,” with the emphasis on the now. Jesus blows away this “already / but not yet,” by making so much of it for now, not later.
When Jesus went to raise Lazarus from the dead, Martha said to him, “Lord, if you had been here, my brother would not have died.” So the theologians tell us, “These things had happened in the past.” Jesus answered, “Your brother will rise again.” But Martha said, “I know that he will rise again in the resurrection on the last day.” So the theologians tell us, “These things will happen in the future.” Jesus answered, “I am the resurrection and the life.” The sisters applied the “already / not yet” principle on Jesus, but rather than displaying their theological education, it revealed their unbelief and ignorance. They did not even know Jesus very well. For Jesus, it is always a good time for a miracle. In the theology of Jesus, it is not a matter of time, but a matter of faith. He said to Martha, “Did I not tell you that if you believed you would see the glory of God?” And Lazarus was raised from the dead.
This is similar to how Jesus gives proof to John the Baptist that He is the Messiah who is bringing in the Kingdom of God. Not the Kingdom of God later, but now. He says, “healing, healing, healing, healing, resurrection and truth proclaimed.” That is, healing is a physical not invisible reality, such as forgiveness and a cleansed soul. It is a miraculous physical reality. As to resurrection, Jesus meant it, as a second time for a present tense physical reality. Thus, Jesus’ Kingdom now is referred to by Jesus as “miraculous physical, miraculous physical, miraculous physical, miraculous physical, miraculous physical and truth (which is invisible/spiritual). Thus, those who overemphasize the now part of Jesus’ Kingdom as the invisible, spiritual realities are enemies of Jesus, because they are working against His Kingdom and command.
Faith is the issue. You do not have the things that the Bible promises not because they are reserved for the “not yet” — they have already arrived, but you have not yet believed! It is always a good time for a miracle. It is always a good time for God to save, to heal, and to bless. It is always a good time for God to be a Father, and for Jesus Christ to be glorified. As the apostle said, the righteousness that is of faith does not say, “Who will ascend into heaven?” as if to bring Christ down from heaven, and it does not say, “Who will descend into the abyss?” as if to bring Christ back from the dead. Jesus Christ had already come down from heaven, and he had already returned from the dead. But faith says, “The word is near you, in your mouth and in your heart.” It is still a good time for a miracle. The theologians who are so smug with their “already / not yet” corrective have not attained beyond the theology of Martha. And they are the doctors who teach you!