To the scientist, the lab is like a church or a sanctuary, a micro-world where he finds a safe environment to develop his ideas, and where his jargon is well understood by his colleagues. The gospel he preaches is illustrated with graphs, and is proven beyond reasonable doubt with experimental data, up to three digits after the comma. He has become a believer of his shared truth, and he is prepared to evangelize his work to make this world a better place. The people he wants to convince are first and foremost the facilitators of his own work, his sponsors. Also, his friends and family need to be made part of his considerable contributions to society. Finally, the man in the street, the voter, has to be convinced of the importance of science, since politics can retrieve the money plug at any point in time. To do that, the scientist will have to communicate.