Jesus calls every single one of us. It doesn’t matter what we’ve done or what we’re doing. When we say “yes” to His call, a conversion occurs. We’re no longer the person we once were. Does that mean we don’t mess up and make mistakes? No! But it means we know the relationship that gets damaged when we do.
Have you ever had a crush on someone, but they didn’t know it? The guy/girl went about his/her business (maybe even having a crush on someone else and asking you for advice… the nerve!). The second your feelings get revealed though, even if they aren’t returned, your crush’s behavior changes. He/she doesn’t want to hurt you and is more careful around you. That’s the same with our relationship with God, once we answer His call. We may not choose Him all the time (sin), but we know how He feels about us, so we’re a little more careful.