Please, before flagging this question as subjective or generic, take a moment to read it through. IMO this is a valid, specific question, albeit a bit complex.
To try and unpack the admittedly obscure title, I will use an example:
Imagine you have a character who plans her life and daily activities according to "fate" or "signs". Let's say she has suffered some past trauma and thinks she is fated to never meet a kind man. Now, assume you want to introduce a turning point in the narrative journey, something that will make this woman realize that there is no such thing as fate.
Any thought on how to achieve that, since the idea of a turning point seems intrinsically connected with the very notion it tries to dispel (the presence of fate)?
EDIT: Based on Anir Mass's input, I'd like to clarify this a bit: By "turning point", if the term isn't transparent, imagine something in the direction of a "Deus ex machina" device. In our case, then, the question becomes: How do you "awaken" someone from their fallacious thought that life should be lived according to signs, if such a device (i.e. that would cause the awakening) can be construed as a sign itself