Job had tremendous difficulty interpreting God’s silence towards him. We do not normally refuse to answer those we love especially when they cry to us in what they regard as their greatest hour of need.
How do trials of faith increase faith? They do so because having gone through the trial we look back and say, I was right to trust him even though it appeared that he had failed me. Faith in God is justified in every situation. God is more to be relied upon than any amount of counter evidence or false accusation and I have personally proved it to be the case. One word from God is sufficient to oppose all words to the contrary, for God may speak once and it is enough to provide us with a shield against all the cunning of the devil, therefore Adam was held responsible for his disobedience.