There is, of course, the sense in which Christians both always dwell in the presence of God and the Spirit of God always indwells each Christian. But the relationship between God and His people is not unlike the relationship of human beings to one another - in order for the relationship to survive and grow, there must be times when each has the undivided attention of the other. For the Christian, there is no longer this sense of separation, but a deep sense of fellowship with God, as the author of Hebrews describes in great detail. Still, as the author of Hebrews is careful to point out in chapter 12, the meeting between men and God takes on greater, not lesser, significance for Christians. In much the same way, the presence of God in the New Testament opens up so much more of the awesomeness as well as the closeness of God - the great truths with which the Revelation of John begins its message to the Christian community.
Christian worship involves no such goal.
God and the Christian are already one, in fellowship though not in substance. The goal in Christian worship is not for the worshipper to dissolve into God, or be taken over by God, but to become one with God in fellowship, character, goals, and understanding. But always with God as the sovereign. In fact, in the Scriptures, even faith in Christ, that which leads to Christian worship, is not an option, but an act of obedience to God. To reject God's Chosen One is to reject God Himself.