Immortality being one of the most consoling and comforting dogmas of religion, should be reserved for the aspirations of Man's faith: and can never therefore be proved by facts acceptable to the cold criticism of science. It can nevertheless be proved by incontestable facts contemplated by Siddhars: but the present day scientists. Matters which present day science cannot at present ascertain with convincing satisfaction can only be reasoned through hypothesis. Humanity is ordinarily bound to know nothing of the Superhuman, which is beyond its average scope, Immortality in the flesh is a possibility: and a physical body can be kept on as long as the spirit desires its use; and a physical body can be kept on as long as the spirit desired its use; and it is only then that this body instead of decreasing in strength and vigour as years go on, comes to maintain perpetual youth according to the Siddhars system. We have every reason and foundation of fact to believe in the theories put forth by siddhars in their valuable treatises. Immortals according to them are beings credited with powers distinct from and greater than those of 'mortals', and they gain these supernatural powers through taking to Kalpam.
When rank materialism is growing ore and more rampant as at present, there has been evidenced more than ever on earnest demand for a longer and more perfect physical life; and more human minds are now actuated by the actively curious desire to know in full the possibilities of life. They have come to appreciate more than ever then ever advantages and benefits of living in the physical. It should here be borne in mind that man will realise these results only through the exercise of a gradual series of spiritual processes operating on and refining the material body; and these results could be achieved only through the exercise of a gradual series of spirituals processes operating on and refining the material body; and there results could be achieved only through following Siddhars teachings on Rejuvenation.
All diseases(lack of physical ease) manifested during the process of rejuvenation emanate from spiritual causes; and the aim of all of which is the reconstruction of the physical body, first through receiving new elements, and the next in the casting off of old ones. At the back however of all these processes of physical reconstruction, there is bound to be going on the far more important process of reconstruction of the spirit by which the body is being built. These processes are continuously going on within the body operating thought the skin the stomach and the other organs . All kinds of sickness are at best an effort of the spirit roused to increased activity by the fresh influx of forces arising from rejuvenation. only to cast off all old and relatively dead matter. But as this secret of the Siddhars has not been recognised by the human race, this spiritual process or effort with its accompanying pain and discomfort indicated by siddhars, has been held in fear and shunned as signals for or the approach of death.
So, with no knowledge of the spiritual Low and judging everything from the materialistic standpoint, the processes described by Siddhars for Rejuvenation are surely bound to lead men to doubt their efficacy; but only after a course of spiritual advancement they will come to receive so much of this influx of now life so as to be obliged to work for further possibilities of existence as also to know how to realise them. As human minds come to trust the supreme power in however small an extent and appreciate the absolute necessities, then the higher power is surely bound to prevail. Although one has to face ordeals at every step on the course of treatment by elixir or Kalpam, one will surely find his body better and stronger after each successive stage of the struggle; and these struggles also will gradually become less and less sever until they eventually cease and disappear altogether.
Medicines and material remedies may also greatly help one in this process of throwing - off useless matter, if used according to the instructions issued in Siddhars works, and they will be found to be of great assistance in the attempt, provided one has the mind and faith to do it. This has already been touched upon under 'Rejuvenation'.