Each one of us is alone in ...

Each one of us is alone in the world. He is shut in a tower of brass, and can communicate with his fellows only by signs, and the signs have no common value, so that their sense is vague and uncertain. We seek pitifully to convey to others the treasures of our heart, but they have not the power to accept them, and so we go lonely, side by side but not together, unable to know our fellows and unknown by them.
Each one of us is alone in the world. He is shut in a tower of brass, and can communicate with his fellows only by signs, and the signs have no common value, so that their sense is vague and uncertain. We seek pitifully to convey to others the treasures of our heart, but they have not the power to accept them, and so we go lonely, side by side but not together, unable to know our fellows and unknown by them.

Quotes from the same author

In civilized communities men's idiosyncrasies are mitigated by the necessity of conforming to certain rules of behavior. Culture is a mask that hides their faces.
Man has always sacrificed truth to his vanity, comfort and advantage. He lives not by truth but by make-believe.
Few misfortunes can befall a boy which bring worse consequence than to have a really affectionate mother.
if you'd ever had a grown-up daughter you'd know that by comparison a bucking steer is easy to manage. And as to knowing what goes on inside her - well, it's much better to pretend you're the simple, innocent old fool she almost certainly takes you for.
You've been brought up like a gentleman and a Christian, and I should be false to the trust laid upon me by your dead father and mother if I allowed you to expose yourself to such temptation.' Well, I know I'm not a Christian and I'm beginning to doubt whether I'm a gentleman,' said Philip.