Doubt and faith

Came across this quote today morning.

Doubt and faith both are status of mind.  Doubt creates the darkest moments in our finest hour; while faith brings finest moments in our darkest hour. 

Appeared sound in the beginning.  But then something struck as out of place or not complete.  Both, doubt and faith, are not just related to the mind.  They have more to do with the heart than the mind.  Moreover, they compliment one another.  They feed into one another and sustain the other.  Far from being in competition or out to annihilate the other, each of them actually sustains the other.  A genuine doubt will urge you to move towards its resolution and in the process you are bound to rely on some convictions or principles.  That's faith.  Granted that at the end of the process, those principles or convictions may not any more be there or be modified.  But then you arrive at something 'better', something more profound and deeper.  Similarly true faith is not something that lacks doubt or has no place for it.  If one does not doubt, one will never experience what faith truly is.