Hands up, who Wikipedia'd
'Opening Lines' ?
The two that immediately come to mind for me are
It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season
of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all going direct the other way - in short, the period was so
far like the present period, that some of its noisiest authorities insisted on its being received, for good or for evil, in the superlative degree of comparison only
Lolita, light of my life, fire of my loins. My sin, my soul. Lo-lee-ta: the tip of the tongue taking a trip of three steps down the palate to tap, at three, on the teeth.
Lo. Lee. Ta.
I also quite like the following one from The Book of Disquiet by Fernando Pessoa:
I was born in a time when the majority of young people had lost faith in God, for the same reason their elders had had it - without knowing why.
And the following opening lines from one of my favourite Larkin poems:
They fuck you up, your mum and dad./ They may not mean to, but they do.