Butlerism vs. The Bhagavad-Gîtâ.
You assert that:
“The soul transmigrates from a baby body to a boyhood body, and then migrates into a young man’s body. A person who used to live in a young body now lives in a middle-aged body. And a person who used to live in a middle-aged body now lives in an old body … all the cells have changed, the bones have changed, the whole body is different. This is a scientific fact”.
Your assertion, or “scientific fact”, claiming that four supposed occurrences of a person’s “transmigration (s)” take place from between their “baby body” through to their “old body” is in conflict with the Hindu doctrine of ‘Transmigration’ (‘samsãra’). This doctrine, as I understand it, is defined in Hinduism as a ‘principle’ (‘Âtman’) that supposedly passes from one body after death; and enters into another body’. Your assertion contradicts the text of the Bhagavad-Gîtâ itself, and your former spiritual master; the late Swami Prabhupada (v.i.).
The Bhagavad-Gîtâ:
dehino ′smin yathâ dehe kaumâram yauvanam jarâ tathâ dehântara-prâptir dhÎras tatra na muhyati.
ch. 2, text 13. [Sanskrit]
dehinah – of the embodied; asmin – in this; yathâ – as; dehe – in the body; kaumâram – boyhood; yauvanam – youth; jarâ – old age; tathâ – similarly; deha-antara – of transference of the body; prâptih – achievement; dhîrah- the sober; tatra – thereupon; na – never; muhyati – is deluded.
ch. 2, text 13. [Enghlish transliteration]
The Bhagavad-Gîtâ doesn’t indicate a transference (deha-antara) between boyhood (kaumâram), youth (yauvanam) and old age (jarâ), but a transfer at death (tathâ dehântara-prâptir); i.e., ‘mrtyuh’.
Swami Prabhupada
“… the same spirit soul is there and does not undergo any change. This individual soul finally changes the body at death and transmigrates to another body…” (sic.) ibid.
Thereby, your claims, are in conflict with both your own text (Bhagavad- Gîtâ), and your late spiritual master Swami Prabhupada. Furthermore, on your admission, you have exhibited unsubstantial and negligent claims. Firstly, in asserting that “the soul transmigrates” four times, within the individual living body during its life cycle; rather than at death. Moreover, secondly, that “cells” of the human organism “change” and are “different” during the individual life period.
The definitional contradistinctions between “change” (permutãtio), and “renewal” (renovatio) may appear to be a moot point, or even pedantic, to the less discerning. However, to the more circumspect, there is an arguably refined distinction that favours “renewal”, rather than “change”. Due to quadruple somatic cell divisions (mitosis) of the nucleus, that result in two genetically similar offsprings which differs, quite considerably, from cell “change”. This quite clearly belong to the realm of the scientific, i.e., the ‘body’. (‘σϖμα’). Which clearly falls within the ambit of empirical observations. The ‘spirit’ (πνευματικóν the root definition being: ‘breath’ or ‘breeze’) is that by extension the ‘life principle’ that the body (‘σωμα’) depends. Whereas the ‘soul’ (ψυχη), is the immortal, immaterial part of the individual as opposed to the intellectual and analytical. All things considered, both your interpretation of the Bhagavad-Gîtâ and understanding of scientific facts are sadly wanting.