Posting on the thread about lines of fiction that give you chills made me think of one I always used to adore, from War of the Worlds.
"Dim and wonderful is the vision I have conjured up in my mind of life spreading slowly from this little seed-bed of the solar system, throughout the inanimate vastness of sidereal space."
I read it as a teen, and for some reason it always seemed very deep and 'important' - most satisfying (and I had to look up sidereal!!)
Have quite impressed myself actually, as I can still remember it exactly.
What lines make you sigh happily?