Honour your own words as if they were an important contract. Once you've said it, you have to keep it.
"He who guards his mouth preserves his life, but one who talks too much comes to ruin.
He who despises a word will suffer for it, but he who respects a command will be rewarded." (Proverbs 13:3,13 Complete Jewish Bible version)
“The wise in heart will receive commandments: but a prating fool will fall.” (Proverbs 10:8, King James)
“The way of a fool is right in his own eyes: but he that hears counsel is wise.” (Proverbs 12:15)
“A reproof enters more into a wise man than a hundred stripes [of the whip] into a fool.” (Proverbs 17:10)
“A little that a righteous man has is better than the riches of many wicked.” (Psalms 37:16)
“A righteous [one] hates lying: but a wicked [one] is loathsome, and comes to shame.” (Proverbs 13:5)
“Let the words of my mouth, and the meditation of my heart, be acceptable in your sight, O Lord, my strength, and my redeemer.” (Psalm 19:14)
“My son, if you will receive my words, and hide my commandments with you so that you incline your ear to wisdom, and apply your heart to understanding; yes, if you cry after knowledge, and lift up your voice for understanding, if you seek her as silver, and search for her as for hidden treasures, then you will understand the fear of the Lord, and find the knowledge of God. For the Lord gives wisdom: out of his mouth comes knowledge and understanding; he lays up sound wisdom for the righteous: he is a buckler to those who walk uprightly. He keeps the paths of judgment, and preserves the way of his saints. Then you will understand righteousness, and judgment, and equity; yes, every good path.” (Proverbs 2:1-9)
In the daily reality, words are like pennies - going from hand to hand, mouth to mouth. Sometimes we have a break in our "brain to mouth" connection. Soul, heart and brain should be in harmony, and words not more than a good tool which is used wisely.