Romans 8:19-23 explains:
For the creation waits with eager longing for the revealing of the sons of God; for the creation was subjected to futility, not of its own will but by the will of him who subjected it in hope; because the creation itself will be set free from its bondage to decay and obtain the glorious liberty of the children of God. We know that the whole creation has been groaning in travail together until now; and not only the creation, but we ourselves, who have the first fruits of the Spirit, groan inwardly as we wait for the adoption as sons, the redemption of our bodies.The desire of all things is to see the day when we can receive the true love of God through human beings. All things of the creation are looking forward to the fulfillment of the three basic loves: the love of God, the parental love from true parents, and the love of the children who receive this perfect love of God and parents.
Because of this day, the entire cosmos has become harmonized: God, humanity, and all things. All things can find their real owner and all humankind can give glory to God because we have the freedom to embrace and love all things. Following our Father's example we should fulfill our position as God's representatives and children and truly love all things.
Excerpted below is The Day of All Things speech, "True Ownership," given by Father on June 11, 1983. It appeared in the July 1983 Today's World.
In order to restore things from false to true ownership, we have been doing fund raising in which we invest all our heart and love. By Principle, we helped all things be restored into the realm of true love. So, after Parents Day and Children's Day could be announced, the Day of All Things could be proclaimed. As we know from the book of Romans, all things are in lamentation, sighing that they are in the hands of the wrong ownership. So for ownership to come into the hands of God or the country of God's dominion, it has to become dominated by true love. True love is what all things want. They are really disappointed and sighing because they are the prisoner and slave of unrighteous ownership. In order for them to go back to the true love dominion -- to the godly nation, tribe, clan, and ultimately to the godly parents and children -- the only way is for all things to be returned to the ownership of God.