In order for a kingdom citizen to live peacefully with God and all mankind, they would need to have love in their life.
Mark 12:28 (NKJV) Then one of the scribes came, and having heard them reasoning together, perceiving that He had answered them well, asked Him, Which is the first commandment of all? 29 Jesus answered him, The first of all the commandments is: Hear, O Israel, the Lord our God, the Lord is one. 30 And you shall love the Lord with all your heart, with all your soul, and with all your mind, and with all your strength. This is the first commandment. 31 And the second is like it, is this: You shall love your neighbor as yourself. There is no other commandment greater than these. 32 So the scribe said to Him, Well said, Teacher. You have spoken the truth, for there is one God, and there is no other but He. 33 And to love Him with all the heart, and all the understanding with all the soul, and with all the strength, and to love one’s neighbor as oneself, is more than all the whole burnt offerings and sacrifices. 34 Now when Jesus saw that he answered wisely, He said to him, You are not far from the Kingdom of God. But after that no one dared question Him.