In the 14th verse of Psalm 51 the penitent looks towards their destiny:
Psalm 51:14: “Restore my joy in your salvation; sustain in me a willing spirit”
(Via USCCB.)
Happiness is being on the path to Heaven, it is the true joy that fills your soul and gives your life its meaning. This particular happiness is not an attachment to Earthly things. It is the “true joy” that fills our soul with a desire for union with God and a yearning for our true home and helps free us from our addictions. It is the desire for holiness and virtue.
God is necessary to sustain that desire. With the assistance of the Lord our human will is directed towards our eventual union with Him. We place our will and our trust in Him, and He will bring us safely home.
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