he was convinced that no one would believe him even if he told the truth

A hypothesis

Could we believe with the might of our entire conviction in a hypothesis just told to us? Even if a great many people believed in it, our minds would still revolt. For the manner in which we are taught to derive truth is through reason and to ask us to believe in a hypothesis without any former rationalizing is absurd - a grave infidelity to the mind.

Thus arises the question of whether it is right to convince a person to depart from his rationale for just a moment and rest his belief in an unfounded hypothesis. “There are benefits,” you tell him. But that hardly makes for a good excuse to blanket his reason. Good things abound in all of creation. Furthermore, if he would question now and not find the answers pleasing, he would question again later; perhaps at a time when he has already developed a habit out of the hypothesis. And then he would suffer a greater distress than the earlier dichotomy, for on one hand his wishes to leave behind the belief while on the other he cannot bear to part with it.

What is the morally just action?