Matthew 7:12 is the formula for putting God's law to practical use: do to others, and to God Himself, what you would want done to you. It is an active, living law that produces the favorable life God intends when He says the purpose of the commandment is love from a pure heart. Thinking before acting restrains selfish words and deeds, since no one wants to be gossiped about, lied to, or stolen from. The principle is bound up with Jesus' saying that it is more blessed to give than to receive, and with the law of sowing and reaping in Galatians 6:7-10. Giving brings blessing to both giver and receiver, yet it must not be done in order to get, because only self-centered motives cause loss. It must come from a pure heart out of obedience to Christ. Serving others makes one great in God's eyes and builds the holiness required of those training for the priesthood, who must love as Christ loved. Like a garden, the harvest may take a long time and requires patient labor, and it varies with each person, so faith is needed until the resurrection. Sincerity must also be joined with truth. Christ's sacrifice for sinners is the model. Luke 6 extends the principle to enemies: love them and give generously, since what is given returns "pressed down, shaken together, and running over." This is how unity and holiness are produced in the church, and with God's Spirit it can be done.

Jesus gives the instruction that just as you want men to do to you, you also do to them likewise. This forms the basis for understanding kindness by doing for others whatever kind thing one would desire others to do. The approach applies to returning a brother's or sister's cell phone or iPad by keeping it until they call, text, email, or message and then restoring it to them. The same applies to a jacket, checkbook, wallet, or anything lost that has been found. One must not ignore such a loss or pass by a brother's or sister's car with a flat tire or out of gasoline but must help them get going again. This way of life involves outgoing concern for the good of others by offering a hand to help them do what they cannot do for themselves and healing an injured situation. One must love one another with brotherly affection and outdo one another in showing honor while doing good to all and especially to those of the household of faith.

The principle of doing to others as one would have them do in return forms the practical expression of justice tempered by mercy and compassion. Jesus presents this standard as an active choice of the will rather than natural affection, commanding His followers to love enemies, do good to those who hate them, bless those who curse them, and give without expecting repayment. Such conduct mirrors the Father's own kindness toward the unthankful and evil, requiring the same impartial generosity that God extends to humanity. This rule integrates directly with the broader call to emulate divine mercy. Because God has forgiven an immeasurable debt through Christ, believers must release others from lesser offenses and extend help to the needy without regard for status or ability to reciprocate. Partiality, whether favoring the wealthy or neglecting the poor, violates this standard and contradicts the law of liberty. When mercy is withheld, judgment remains unsoftened; when mercy is shown, it triumphs over strict justice both in present relationships and at the final accounting. The command therefore links personal conduct to God's character: those who treat others with the fairness, forgiveness, and compassion they themselves desire demonstrate that they have understood and received His mercy. In this way the principle becomes the visible mark of spiritual completeness, preparing believers to stand approved before the One who is rich in mercy.