乐观中带着莫名的卑微
[lè guān zhōng dài zhe mò míng de bēi wēi]
Translated as being optimistic with inexplicable meekness, this indicates that though fundamentally positive in nature, the user admits there's still a lingering sense of unimportance, humility, or unworthiness that can't quite be shaken off or explained rationally, which is an internal contradiction of self-perception. The optimism suggests resilience while 'the lowliness' shows vulnerability. Overall it reveals a rather complex psyche.