A relationship is likely to last way longer, if each partner convinces or has convinced themselves that they do not deserve their partner, even if that is not true.
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.