Here's why:
* Words can be easily manipulated: People can say things they don't mean, or they might say things to please others. Words are often influenced by emotions, social pressures, or a desire to appear a certain way.
* Actions are harder to fake: Actions require effort and commitment. They reveal a person's true priorities and values.
* Consistency is key: Actions are more consistent than words. They show a pattern of behavior that reflects a person's true nature.
In essence, the saying suggests that we should judge people by what they do, not just what they say.