You should expect miracles, because He is expecting miracles from you! Miracles pertaining to the changing of hearts. These are the greatest miracles of all, those that bless lives and lift souls! Of course don't expect Him to cover for your laziness, however He does make-up the difference, when asked, for your weaknesses, even spiritual frailties.
He cannot be deceived or used or manipulated. Instead become His friend by listening to what He has and does say, whether through the scriptures, his prophets today, or by the spirit to you in prayer. Trust Him and be trustworthy yourself. Be humble and admit all weaknesses and errors to Him. Then trust in His counsel through His servants. He will help you in your weakness, if you seek to follow Him wholly.