God speaks to us through warning dreams and through suffering

Job 33:1-33
Elihu said to Job that he is not right for Job thought he is pure and without sin.
God is greater than man, why do you complain to him that he answers one of man's words? For God does speak - now one way, now another - though man may not perceive it.
Yet there is an angel on his side as a mediator中間人, one out of a thousand, to tell a man what is right for him.
Then he comes to men and says,"I sinned, and perverted that was right, but I did not get what I deserved."
Job has declared himself the innocent victim of God; but God will not answer his charge.
Elihu says God speaks to us through warning dreams and through suffering - in order to save, not destroy us.
Do not complain to the Lord for He is God, he is greater than us. All of us are same have been taken from clay.
Why?
God is full of love, God does not answer to man, but the angle will send warning message to man through dream or some suffering to remind us, like mediator.
God wants to save us not to destroy us. Man dies for his own sins.
How?
Careful to every dream or suffering and mediating does it be good to me?