Faith represents, formally, an enduring personal order in the midst of chaos and change.
Faith, therefore, represents a qualitative alternative to chaos. It is above, where chaos is below.
And living by personal rules in a consistent way is a type of faith: it represents the notion that things will be better over time with organized, ordered behavior, relative to doing every last little thing that pops in your head, consequences be damned.
From this perspective, the dictum “do what thou will” is a rejection of faith, and of order. It is a descent below the level of the animal, since even animals, acting by instinct, act always with purpose.
I have seen enough demons to say their shared essence is chaos and formlessness. This is why faith and trust represent their antithesis.