Choosing to buy a particular book over others only or mainly because it is the cheapest is excusable only if you are learning to read.
One of the most common and most dangerous misbeliefs is that it is impossible for someone to be stupid just because they are a doctor or a lawyer.
Plants are more courageous than almost all human beings: an orange tree would rather die than produce lemons, whereas instead of dying the average person would rather be someone they are not.