What is mind? Mind consists of various thoughts, generated by our conditioned existence.
It is true that most of us have no desire to harm; nevertheless, we do cause lots of pain for others, especially through our speech. Without the radar of mindfulness on, our speech is usually infused with, and driven by, an ego trip. Consequently, our utterances slice the hearts of others into many pieces. With the radar of mindfulness on, all the utterances are based on, and stem from, compassion and unbiased observation. We have the capacity to change ourselves. As stated in the proverbial saying:
Instead of cursing the darkness, we should strive to be the light.
We want to be the light. We can be the light. Therefore, we should practice mindfulness, enabling us to engage in positive speech, and thus, we become the light.