Lyric discussion by ShineYouDiamond 

Cover art for Slip Slidin' Away lyrics by Simon and Garfunkel

I am interested in the answers to two questions about this (brilliant) song:

1) Is it the story of one single family? (passion --> marital stagnation --> alienation)

2) How much is autibiographical? I've always felt that verse three must be.

Please let me have your thoughts...