Confidence in the LORD

How is faith the fruit of what Christ bought at the cross? Do we have anything to do with our faith? Was every child of God saved at the same time? Is true faith always from God? How does the LORD keep His own? How is it God's work of Grace in the heart that allow His children to preserver? What did it mean to 'give your word'? What does it mean to be trustworthy? How did Peter find out he was not faithful or trustworthy? How are all the attributes of God Holy? Why are the gods of men's imaginations conditioned on what they themselves do? How are Christ's children 'irrevocable beneficiaries' of His? Is faith a preference of man or a persuasion of God? What role does predictability play in trusting the LORD?