All logic, truth, and left centred activity is solely dictated by belief. To have one's existence overhauled mentally by the realisation that the entirety of a long held belief as false- throws the doors wide open.
They call it an existential crisis. It's categorized as this- (Source- Wikipedia- Peter Wessel Zapffe, Norwegian Philosopher)
Anchoring is the "fixation of points within, or construction of walls around, the liquid fray of consciousness". The anchoring mechanism provides individuals with a value or an ideal that allows them to focus their attentions in a consistent manner. Zapffe also applied the anchoring principle to society, and stated "God, the Church, the State, morality, fate, the laws of life, the people, the future" are all examples of collective primary anchoring firmaments.
Isolation is "a fully arbitrary dismissal from consciousness of all disturbing and destructive thought and feeling".
Distraction occurs when "one limits attention to the critical bounds by constantly enthralling it with impressions". Distraction focuses all of one's energy on a task or idea to prevent the mind from turning in on itself.
Sublimation is the refocusing of energy away from negative outlets, toward positive ones. The individual distances him or herself and looks at his or her existence from an aesthetic point of view (e.g. writers, poets, painters).The act in itself of being left with nothingness, as all encompassingly nihilistic as it may be and sound, can directly lead to the true meaning of freedom- to create. A rewrite, a complete start from scratch. As painful as it can be to look upon something- for example- a written work in which one has invested great time, care and effort in seeing through, to looking over it's evolution and realizing with dismay that it makes no solid sense- to scrap and rewrite can make one initially feel as though the whole exercise was pointless and sink into an inert, frustrated state. However, for one not to have written the work in the first place would not have allowed for growth to occur.
Perhaps the highlighting of meaninglessness, of absurdity is to understand that the idea, belief and investment are also privy to the balance of life- they lack permanence, and that the 'death of knowing', carried past the initial stages of seeming apathetic depression that it leaves, with careful nurturing of the quiet, can become something quite magical and cleansing. Looking upon the world with fresh eyes, without limitations. Seeing as it is- for what it is. To no longer cling to sacredness, but to strengthen the wide expanse of all the things that are not known. To protect it's youth, and to see it to whatever it will become. Without the investment, without the preceding, without the expectation.
It is what happens after such an overhaul that one must decide. It is what we make it. It is what we create. We do have ultimate freedom. It's the only thing we have true responsibility for.