To err is human, to forgive divine
This idiom means means everyone of us makes mistake, it is good for us to forgive them.
Breaking it down:
"To err" means to make mistake so the phrase implies that every human makes mistake
"divine" is referring to God. This implies that to forgive is a difficult task and when we forgive others we have God's ability to forgive others for their wrongdoings.
Sentence usage:
" I'll never forgive him for what he has done!"
" Just let it go, to forgive is human, to err divine"
with reference to http://www.goenglish.com/
with love,
Yvonne