Complex sentence: Wilde's artistic condensation in the form of the Dorian Gray portrait both cites and transgresses narcissistic mirror motives, and eternal beauty and the process of aging and maturation are represented by the person and mirror dyad.
Split into simpler sentences: Wilde's artistic condensation in form of the Dorian Gray picture hereby cites and transgresses narcissistic mirror motives. So, eternal beauty and the process of aging and maturation are represented by the person and mirror dyad.