孤久则惯久念泛滥
[gū jiŭ zé guàn jiŭ niàn fàn làn]
In Chinese philosophy, the idea of isolation (‘孤’) for a long time results in forming a habit ('习惯'). Meanwhile, emotions and thoughts may flood ('泛滥') as loneliness deepens. So the overall meaning here is probably about being lonely for so long it becomes habitual; then feelings overflow.