According to (one's) own lights idiom
Dựa theo cách người ta tin tưởng.
Don't try to please others. Just live according to my own lights!
Live according to your own lights and don't be afraid of making mistakes.
Sarah has always been very independent and lived according to her own lights.
To punish someone or something harshly
He's a really strict teacher, so he'll definitely lower the boom on you if you don't do your homework.