It is a mistake to believe that science consists in nothing but conclusively proved propositions, and it is unjust to demand that it should. It is a demand made by those who feel a craving for authority in some form to replace the religious catechism by something else, even a scientific one.
Sigmund FreudThe only person with whom you have to compare ourselves, is that you in the past. And the only per-son better you should be, this is who you are now.
Sigmund Freud