海再冷也冷不过孤独
[hăi zài lĕng yĕ lĕng bù guò gū dú]
'The Sea Is Cold But Loneliness Is Colder.' This suggests that while natural elements evoke chilliness and may induce cold physically, inner solitude induces a greater sense of chill or sadness mentally, emphasizing the discomfort of being alone.