How can the Christ return to Earth if He has never left humanity ?
In reality, the Christ cannot return because He has always been here on Earth. He can only reappear. Thus His apparent return will be to outer active visibility in earthly affairs. Yet, as we know, seeing and recognition are two very different things. The Christ will be recognised by those who have the capacity to respond, in some way and on some level, to the Christ's quality, for ever the law holds good that like attracts like. The Christ will transmit divine energy which will stimulate a deeply hid-den and latent corresponding principle within humanity. All who seek right human relations will be gathered automatically to Him, whether they belong to one of the world religions or not. The true followers of Christ are all those who love their fellowmen and see no barriers among people for the major effect of the reappearance of the Christ will be the stimulation of the spirit of inclusiveness. 
How do we know when the Christ will return ?
The Christ will have no proclaimers; no one to say "He is here" or "He is there". The Christ will be known by all in whom the Christ principle, which is love, is awakening. It is not for humanity to set the date for the appearing of the Christ, or to expect any outstanding aid or unusual phe-nomena. The Christ will come unfailingly when a measure of peace has been restored, when the principle of sharing is at least in process of controlling eco-nomic affairs, and when religious institutions and political groups have begun to clean house. If our work is rightly done, He will come at the set and appointed time. How, where or when He will come is not our concern, yet in such an hour as ye think not, He will come" (Matthew XXIV 44).
Signs of the Christ's approach can be seen in the recent and ongoing Cycle of Conferences" underway particularly in recent decades and often held under the auspices of the United Nations in such areas of concern as human rights, the needs of children and women, human habitats, population growth, and the environment and development. The presence of the Christ's energy is an attractive force, binding together for the common good. This spirit is more and more visible in the contribution of the new group of world servers, a subjective grouping of all men and women of goodwill who work actively on behalf of the Plan. In all areas of human activity the new group of world servers is at work to establish right human relations, which is the fun-damental requirement for the Christ's reappearance.
The Great Invocation is essentially Christ's own mantram and its sound has gone forth to the entire world through Christ's enunciation of it and through its use by the Hierarchy. Every disciple should make its distribution as well as its daily use a major duty and obligation, for the Great Invocation can be used with profound effectiveness, primarily by those who know something of meditation and thus have some skill in mental concentration and intense focusing. The most important contribution of all who would help to prepare the Christ's way is to teach humanity to use the Great Invocation so that it becomes a world prayer and focuses the invocative demand of humanity.