Sun Myung Moon's Words From 1967
When you face painful and agonizing situations and feel like you have reached the end of your rope, you must focus on the central point -- God has never experienced real joy in His Heart. His Heart is only embracing sorrow and agony. Therefore, your question is how to comfort God's grieving heart. It is our important responsibility as members of Unification Church.
When you gain a victory, you must thank God with tears of gratitude. The victory you gain today is not a victory won by your efforts alone. From the first victory, to the one-hundredth, to the ten-millionth victory, every victory is won because God's decisive motive is behind it. Thus, those who understand this principle must always keep grateful hearts to Him, even when going through courses filled with tears. Jesus offered his gratitude to God, when he went the course of the cross. Unless the heart of gratitude had remained, even after death by crucifixion, there would not have been his resurrection.
Therefore, we must fight on and continue fighting on. After a victory, with gratitude to God, you must move on-ward to the world on the road of battle. This is where you stand in the process of restoration. Don't forget that.
"Original Source of Loyalty and Filial Piety" is several volumes of books compiled Father Moon's speeches (many of them spoken in Japanese) from later 60's to early 80's by Rev. Kamiyama.