I came across this quoted Pascal in his work Pensées as I prepared for my message this past weekend. It is one that I have shared in previous messages, but it is so relevant to our searching for identity:

“There was once in man a true happiness of which there now remain to him only the mark and empty trace, which he in vain tries to fill from all his surroundings, seeking from things absent the help he does not obtain in things present? But these are all inadequate, because the infinite abyss can only be filled by an infinite and immutable object, that is to say, only by God Himself.

You can access this specific section here, as well as the entire work at the Christian Classics Ethereal Library.