To wish that some event had not taken place is a silly self-torture, for this means to wish something absolutely impossible, and is as irrational as is the wish that the sun should rise in the West. Precisely because everything that happens, great or small, happens with strict necessity, it is altogether useless to reflect on how insignificant and accidental were the causes which brought that event about, and how easily they could have been different. For this is illusory. All of them have happened with just as full a power as that in virtue of which the sun rises in the East.” - Arthur Schopenhauer