This phrase emphasizes the importance of being mindful about speech and the words we use. In our tradition, there is a strong emphasis on the power of speech, recognizing that words can have both positive and negative impacts.
Speech is seen as a tool that can create peace, encouragement, and truth, but it can also lead to harm through gossip (lashon hara), slander, or hurtful remarks. The phrase serves as a reminder to be careful in our communication, ensuring that we speak with integrity, kindness, and mindfulness of the effects our words may have on others.