don't use a person you suspect and don't suspect a person you use
疑人勿使，使人勿疑yírénwùshǐshǐrénwùyí
don't use a person you suspect and don't suspect a person you use
proverb meaning that one should not employ someone if they are distrusted, and one should not maintain doubts about someone once they have been given a task or position
