God longs and desires to fill us with an inner drive and passion to pursue Him with all that we are. The inner drive cannot come from ourselves, it must come from God (Ephesians 2:8-9). And if it must come from God, we must ask Him to do this work in our souls. We must take the necessary steps to receive what He longs and desires to give us.
Unfortunately, this cannot be done if we are already filled with things other than what are of God. There will be no room for Him to fill us with the inner drive and passion to pursue Him. We must be emptied to be filled.