Ontological Unity: Sin
Three quotes from Silouan the Athonite by Archimandrite Sophrony.
Sin is primarily a metaphysical phenomenon whose roots lie in the mystic depths of man's spiritual nature. The essence of sin consists not in the infringement of ethical standards but in a falling away from the eternal Divine life for which man was created and to which, by his very nature, he is called.
Sin will, inevitably pass beyond the boundaries of the sinner's individual life, to burden all humanity and thus affect the fate of the whole world.
Every sin, maifest or secret, committed by each one of us effects the rest of the universe.