Yes, I, too, learned that God is beyond our understanding and to ascribe to Him our features (like emotions, passions, change) is idolatry. God is Love. That's perhaps the only "positive," "cataphatic" statement that we have the right to make about Him. Otherwise, as Fathers taught, we should remain "apophatic" about God, i.e. know what He is NOT. Particularly, He is NOT universe, not something that has limits, limitations in time and space, and He is not something that undergoes a change. So, strictly speaking, He does not get angry (anger is a passion), vindictive, "jealous," etc. When the Bible says about His "anger" or "jealousy," it's figures of speech, like in other places where it says that He has eyes, hands, feet, etc.