Yí gè lǐngdǎozhě bìxū yányú-lǜjǐ, cáinéng fúzhòng.
A leader must be strict with themselves to win others' confidence.
Tips
usage
Almost always paired with 宽以待人 ('lenient with others') as a two-part moral formula - the contrast is the point. Register is formal, often in speeches and self-appraisals.