择善固执

to choose what is good and hold fast to it (idiom)

to select / to choose / to pick over / to pick out / to differentiate / to eliminate / also pr. [zhai2]

good (virtuous) / benevolent / well-disposed / good at sth / to improve or perfect

hard / strong / solid / sure / assuredly / undoubtedly / of course / indeed / admittedly

obstinate / stubborn / to fixate on / to cling to

to execute (a plan) / to grasp