Once you realize that the vast majority of people see and know very little, you will rarely be affected when someone speaks ill or well of you.
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.