When I think honestly about my prayers, I think of all the warm, deep, and intense prayers I can give in the concerns which matter the most to me. When it comes to those things, my heart is open, and all of my center is engaged. Does that mean that God is my priority? Nope! It only means that what I am praying about matters to me.
When I make my passionate, deep, and intense prayers about things I really care about, I move right on to the next thing, and that thing does not matter as much. Suddenly, my prayer goes cold and routine. Has God changed? Of course not. Has he grown cold and routine? Clearly not!
It only means that all my passion and intensity was not because of God's presence and closeness to me. It had nothing to do with my faith or longing for Him and Him alone. It was only about my concerns, not for God.