When we maintain our readiness for Christ’s return by living according to his will, we can “prevent” him from saying to us, “I never knew you.” Call it preventive maintenance of our relationship with him.
We are all hybrid humans living on a right-to-left or “sheep-to-goat” scale. As we grow in our faith and love for Christ, we start to become more selfless and giving toward others, and less selfish or “goat-like.” We begin to live more on the right side of the scale of inhabitants who will be welcomed into God's kingdom.