How is it possible to know what your best songs are? When they are not necessarily; your own favourites; the most musically accomplished; the ones with the best arrangement or the best performance or best recording?
How do you know what your best songs are when some work better live and some work better recorded, those that people seem to like most are those you like least and those that are so simple you are embarrassed by them seem to be the ones that people want to hear?
How do you know what your best songs are when you’ve been writing songs for thirty years but can only remember the ones you’ve written in the last year; and when your critical faculties are shackled by your own taste, prejudices, and formative musical influences?
How do you know what your best songs are? No bloody idea. Not now – and I suspect – not back then.