Unqualified and implicit faith in each other belongs to the world of ideals. In actual practice it exists only in special cases. Though it is very much to be desired, it cannot come unless the world is populated by persons who deserve unlimited faith.
This condition requires a perfect development of the qualities of being reliable, steadfast, and invariably helpful. But these qualities that foster mutual faith remain undeveloped unless one has supreme faith in oneself. If an individual has no faith in himself, he cannot develop those qualities that invite and foster faith from others.
The confidence that you can remain loyal under all sorts of trying circumstances to your own perception of what is right is the very foundation of the superstructure of a reliable character.
-Discourses 7th Ed. p366