what is symbolism for innocence, mortality, youth, isolation, sexuality, sadness, wisdom and knowledge, lies and deceit, madness, and religion
I can't really speak to all of the themes you mention, but I think I can offer you a jump start on some of them. As far as innocence and sexuality go, a primary symbol is the song “Comin’ Thro’ the Rye,” which touches on the subject of sexual taboo and the loss of innocence. This knowledge of sex is important here. In terms of isolation, look to Holden's red hat, which represents his attempt to "stand out" from his peers.
