Romans 12:1-2 helps us with this too.
Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice, holy and pleasing to God—this is your true and proper worship. 2 Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will.
1. View the mercies of God. If we lack passion or interest in being holy, it comes from a failure to contemplate God’s mercies toward us!
2. Remind ourselves that the only rational response to Christ giving us all of Himself is to give all of ourselves to Him.