The success of a lie in supporting one’s life is conditioned by his power to appeal to that lie in a recurrent way.
It is the cognitive power of seeing the evidences of the contrary facts to your false beliefs and still to keep them. To refuse to decline your false beliefs means to have a stronger knowledge than the obvious facts. [Perhaps the image of the believer in lies as their blind servant is wrong]
It is the knowledge of your interest in keeping the lies untouched by any contrary evidences.
When the life is supported by truths, for instance, the truths about the natural world, they must also to be used as frequently as the false beliefs.
But they cannot be used in such manner, because the individual life naturally goes away from objective certainties, since its individuality needs to be preserved by subjective points of view.
It must be added to the truths a personal interest, too. It should be a personal interest in promoting truths and it could be stronger or weaker according to the social circumstances of life. A society which encourages lies makes such personal interest stronger.
However, the knowledge of this personal interest does not derive from the truths themselves, since it is added to them.
On the contrary, the truths would say to us that there is not the case to defend any personal interest. For instance, the natural truth that man is only a mortal animal cannot feed one’s ambitions to fight for the truth.
Thus, the personal interest for truths is less known than the liar’s one.
And many times the defender of truths appeals to lies for supporting his vaguely known interest. [For instance: the false belief that it is worthy to spend your life in claiming truths; the illusion that your labor in claiming truths would make you to enjoy an eternal renown]
Anyway, such lies are harmless, because they do not oppose to the evidences, but join them.