The saints are essential to our progress in becoming good Christians because they teach by example and intercession. Every Catholic needs to inculcate the habit of a personal friendship with the saints in heaven.
Our faith shows us the pathway to hope. It teaches us patience and perseverance in trials and temptations to despair. It is the one thing that pulled many people through the most recent pandemic and, perhaps, renewed their relationship with God, making it even stronger.
The Decalogue (Divine Positive Law) is an explicit statement of what the Natural Law requires of us. Hence, it covers not only Catholics or Christians, but all men. Jesus Christ confirms the commands of the Old Law but reveals more demands for His followers.