The most precious thing in the world is more of an opinion. For example: some people put faith in god, so if you ask them what is the most precious thing, they're going to say god. What I'm saying is, whatever you hold dearest to your heart, whether it is a teddy bear or a favorite sock, it will have ultimate dominance in your heart, so it is the most precious thing in the world. ( To you, which is all that matters )
Love. Without love, we are nothing. Without love, life is meaningless. The meaning of life itself is love: Accepting love from God, giving love back to God through obedience to Him, and loving others as we love God and ourselves. In Christianity, love is not just an emotion but is a different state of being where the boundaries between self and the beloved become blurred. To truly love is in the realm of the supernatural and it requires God to exist. Only through God our Father can we see others as true brothers and sisters. We find God when we attempt to obey His command to love our neighbor for where love is, there God is also. We find God and experience God through our experience with others. Finding God, experiencing God and allowing God to transform us into His sons and daughters is why we are here. God is love. Amen.
The most precious thing in life is karma, that is deeds. One cannot choose somethings like one's parents, one's family, one's talents, faults, country or religion. These things lie solely in the hands of Him. But we can choose to do good deeds to serve the humanity and the Lord. Hence, I believe karma is the most precious thing in life