Allegiance or Faith?

al·le·giance/əˈlējəns/

Noun:

Loyalty or commitment of a subordinate to a superior or of an individual to a group or cause.

faith/fāTH/

Noun:

Complete trust or confidence in someone or something. Strong belief in God or in the doctrines of a religion, based on spiritual apprehension rather than proof.

Can "faith" exist without an object or concept to have faith "in"? 

I've been wondering about this as I read a born again Christian's arguments/explanations for this change in their life. The change being, becoming "born again" and affirming a commitment to a particular belief system.

What I wonder about is: is one's faith dependant upon having a system of belief to have faith in? Can I be a faithful person, trusting in God, god, Jesus, Allah, love, peace, the universe, goddess, Jehovah, or another name for something we cannot define or prove without having an allegiance to a belief system?

And what makes something a "strong" belief versus a "weak" belief? One's level of certainty? Certainty can be form of blindness, and can be dangerous. Humans have been blessed with a questioning mind. And unless the level of my belief is directly correlated to the existence or non-existence of said object of belief (i.e., God), what difference does it make if I question things? Isn't a curious mind a sign of being a fully engaged person, seeking understanding?