The product itself should be it's own best salesman. Not the product alone, but the product plus a mental impression, and atmosphere, which you place around it
Claude C. HopkinsOn most lines, making a sale without making a convert does not count for much. Sales made by conviction - by advertising - are likely to bring permanent customers. People who buy through casual recommendations often do not stick
Claude C. HopkinsHuman nature is perpetual. In most respects it is the same today as in the time of Caesar. So the principles of psychology are fixed and enduring
Claude C. Hopkins