To love God is to let God love us and that is true holiness. When we pass that exam, the second exam is easier. If we fail the first, then the second is a pretense and will end as a failure. As with the Jewish people, we wander away and God is always calling us back into the classroom of love-learning. There are reasons, good reasons, too, why we just cannot love this person or that, right now.
Injuries are very good excuses.
Jesus, as does any good professor, hears them all. The dog ate the cat that ate the term paper. Love is our origin, love is our constant calling, love is our fulfillment in heaven. These are words taken from the Preface of the Mass for weddings. Something there is within us of God as our origin and we need little explanation about our calling.