Nussbaum, Martha C., "The Speech of Alcibiades: A Reading of the Symposium," The Fragility of Goodness: Luck and Ethics in Greek Tragedy and Philosophy, Cambridge: Cambridge University Press, 2001, p. 165-195.

Excerpt:

He was, to begin with, beautiful. He was endowed with a physical grace and splendor that captivated the entire city. They did not decline as he grew, but flourished at each stage with new authority and power. He was always highly conscious of his body, vain about its influence. He would speak of his beauty as his ‘amazing good fortune’, and his ‘windfall from the gods’ (217A). But this was not the limit of his natural gifts.

Online:
Amazon