The great lesson is, that unity is behind all. Call it God, Love, Spirit. Allah, Jehovah - it is the same unity that animates all life from the lowest animal to the noblest man.
Then from the world all spirituality will be extinct, all moral perfection will be extinct, all sweet-souled sympathy for religion will be extinct, all ideality will be extinct; and in its place will reign the duality of lust and luxury as the male and female deities, with money as its priest, fraud, force, and competition its ceremonies, and the human soul its sacrifice. Such a thing can never be.
The attempt is to kill the false "I", so that the real "I", the Lord, will reign. "I the Lord thy God am a jealous God. Thou shalt have no other gods before me," say the Hebrew scriptures.
The Heart and core of everything here is good, that whatever may be the surface waves, deep down and underlying everything, there is an infinite basis of Goodness and Love.
There can be no love so long as there is lust- even a speck of it, as it were, in the heart. None but men of great renunciation, none but mighty giants among men, have a right to that Love Divine. If that highest ideal of love is held out to the masses, it will indirectly tend to stimulate its worldly which dominates the heart of man- for, meditating on love to God by thinking of oneself as His wife or beloved, one would very likely be thinking most of the time of one's own wife- the result is too obvious to point out.
What do we call the river? Every moment the water is changing, the shore is changing, every moment the environment is changing, what is the river then? It is the name of this series of changes.
Even the lowest of the low have the Atman (Soul) inside, which never dies and never is born, immortal, without beginning or end, the all pure, omnipotent and omnipresent Atman!