The Buddha taught four guidelines for Wise Speech (as a core aspect of ethical practice): truthfulness, helpfulness, care and kindness, and appropriateness (especially good timing). We explore the first guideline, partly in connection with the other three guidelines, in four dimensions of practice. First and most basically, we explore how we practice with truthfulness in our individual practice with others. Secondly, we look at how truthfulness is also a central ethical guideline in our communities, organizations, and societies, making possible trust and safety; yet often this guideline is not followed. Thirdly, we look at our contemporary society in terms of truthfulness and the lack of truthfulness. Fourthly, we ask how we might respond, as part of our ethical practice, to develop more truthfulness in the society: What can help? The talk is followed by discussion.