天下之大唯我孤独
[tiān xià zhī dà wéi wŏ gū dú]
'Tian Xia Zhi Da Wei Wo Dan Du', translating to 'In the vast world, only I am lonely.' This expresses profound loneliness even amid vast surroundings or society. There's an underpinning of feeling out of place or isolated in this expansive world.