One should believe in something, sure.
It doesn't matter if one decides to believe in religion, rationality at any cost, pixie dust, ethics, Murphy's law, tolerance, happy endings, science, unicorns, morality, magic, logic, the good intentions of all human beings, music, the laws of attraction, karma, the three main concepts of the French Revolution, the power of now, serendipity or just in oneself.
People make mistakes in life through believing too much, but they have a damned dull time if they believe too little.
James Hilton [1900-1954]
[Tinker Bell's Pixie Dust -
Black and Purple background by TheOriginalGinger]
One should believe in something. Totally got it.
But what if one should not be able to believe any longer?
What if believing would hurt too much? What if believing would actually not even hurt any longer because one is just so sure that it is normal not to believe and that doing otherwise would only cause further pain, disappointment, and dissatisfaction?