These rules reflect another age, but the lessons are timeless. When you’re told someone is as good as their word or that they’re word is his bond, what’s being expressed is not only a belief in their trustworthiness and reliability, but his living up to the ideal set forth at the start of Mattot-Massei. “If a man makes a vow to the Lord or takes an oath imposing an obligation on himself, he shall not break his pledge; he must carry out all that has crossed his lips.” (Numbers 30:3) Words have consequences. Words can harm, but words can also heal. And, the right words can teach, and comfort, and cheer someone. Our words, promises, and oaths are only as great as our intentions if we follow through with them. When we do not fulfill a vow, we have the potential to bring about neglect, discomfort and distrust.
We must be very careful with the promises that we make, and try not to make one, unless you intend to keep it.