xīn心heartān安peacefullǐ理reasondé得obtain
to feel at ease and justified; have a clear conscience
Literal meaning
heart (心) — peaceful (安) — reason (理) — obtain (得)
Origin
A classical four-character phrase describing a state of mental peace due to having done the right thing.
Examples
Wǒ bāngzhù le tā, suǒyǐ xīn'ānlǐdé.我帮助了他，所以心安理得。
I helped him, so I feel at ease and justified.
Tā kào zìjǐ de nǔlì chénggōng, suǒyǐ xīn'ānlǐdé.他靠自己的努力成功，所以心安理得。
He succeeded through his own efforts, so he has a clear conscience.
Usage & nuances
Describes a feeling of peace and justification.
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