Here are 3 quotes from Augustine of Hippo – if you are unfamiliar with him you can read a brief bio HERE.
“Thou hast made us for thyself, O Lord, and our heart is restless until it finds its rest in thee.”
“I was in misery, and misery is the state of every soul overcome by friendship with mortal things and lacerated when they are lost. Then the soul becomes aware of the misery which is its actual condition even before it loses them.”
“For what am I to myself without You, but a guide to my own downfall?”