An important aspect of the climate change challenge is simply that too many people rarely or never talk about it. Any issue that we refuse to talk about can quickly become one that we will do nothing about. We also know that discussing a problem can often help in solving it. Preparing well is the first step to understanding climate change well and then communicating this knowledge well. My colleague Susan Joy Hassol and I have this guiding philosophy that underlies our approach to climate science communication: Use simple clear messages, repeated often, by a variety of trusted messengers. Trusted messengers can have an enormous impact and can motivate people to bring about change. Think of Mahatma Gandhi, or Nelson Mandela, or Martin Luther King Jr. Become something of an expert yourself first, at least in certain areas of climate change science, and only then try to communicate what you have learned.