Easy to know men’s faces, not their hearts

Similar sayings:

Easy to run downhill, much puffing to run up Easy to run downhill, much puffing to run up
Easy to keep the castle that was never besieged Easy to keep the castle that was never besieged
Easy to enroll a thousand soldiers But, ah, one general! Easy to enroll a thousand soldiers But, ah, one general!
Forethought is easy, repentance hard Forethought is easy, repentance hard
Water and words are easy to pour but impossible to recover Water and words are easy to pour but impossible to recover

Chinese sayings and proverbs