What can you say about this quote?!?

Question

let not the words but the action take into account, that a promise will truly count...

Answer 1

Don't listen to what someone says, action speak louder than words; you can tell by a person's past actions whether or not you can trust them to honor their commitments.

This is just a general warning about being too trusting.

Answer 2

You can say that promises from unreliable people are meaningless. Promises from those who have shown they keep their promises are the only ones that are worth believing in.