Chinese Online Dictionary:

Be hard on yourself and be kind to others.

Be strict with yourself and be lenient with others.

Treat others with the spring breeze and treat yourself with the cold wind.

Yang Jian: Treating people with truthfulness not only benefits them, but also benefits them greatly.

"The Classic of Filial Piety": To govern the people safely, one must not be good at etiquette.

Zuo Zhuan: Punish evil and encourage good.