The desire for truth in an individual depends on how much he/she loves the lie which is its opposite.
There are many ways in which this can manifest but, as a rule, the behaviour of such a person can appear ridiculous to those who are not emotionally invested in the matter. They can plead and argue as much as they want, they will not be able to convince someone who has been seduced by a false concept and allowed it to become integrated within their identity.
Once this affinity is established, the Ego will be a fierce protector of the relationship between the individual and his/her illusion, so that any outside attempts to dissolve it will be met with more and more creative denials, which will only serve to increase the power of the lie / delusion over the individual's perceived frame of reality. Our egos are extremely vulnerable and they seem to exist as a separate entity within ourselves. The smallest increase in consciousness changes them, but this fact is understood by the ego as an annihilation, rather than a continuation in a separate or improved form. When our egos are resurrected into a new light, into a new form, when our inner waters have become calm again, we look back at our previous convictions and remember how "naïve" or "immature" we had been as a result of our egos. However, the promise of a greater harmony between a future ego and the self, does not inspire our egos to sacrifice themselves, just as the atheist doesn't want to believe in an immortal soul and desperately clings to the “here and now” as the only reality he/she will ever experience. This ego's desire for self-preservation is also the reason why they will always try to sabotage our future growth, unless our faith and mental projection of a better self comes to our aid.
