内心很平静用英语怎么说

To feel calm inside, in English you could say "to be at peace within oneself" or "to have inner peace." This phrase comes from the idea that peace is a state of being in which one is free from conflict or turmoil, both externally and internally. Here are some example sentences in English and their translations in Chinese:
I try to meditate every day to find inner peace. (我每天都试着冥想以寻找内心的平静。)
She is at peace within herself, even though she has many problems to deal with. (她内心很平静，尽管她有很多问题要处理。)
He was able to find inner peace through mindfulness and self-reflection. (他通过正念和自我反省找到了内心的平静。)