A proverb meaning children reflect their parents' character and habits; a child's behavior often mirrors the parents.
あの子は礼儀正しいね。やっぱり『子は親の鏡』だね。
That child is polite. As expected, 'children are a reflection of their parents.'
先生に褒められた長所は、家庭でのしつけの結果だ。子は親の鏡というけれど本当にそうだ。
The strengths praised by the teacher result from upbringing at home. They say 'children are a mirror of their parents,' and it's truly so.
子は親の鏡だから、まず親自身が直すべきところを見直そう。
Since children mirror their parents, parents should first look at what they themselves need to change.