The Mosaic Covenant is often described in term of being a marriage between God and Israel, so the Mosaic Law is His instructions for how to have a continual relationship with Him. The Hebrew word "yada" refers to an intimate relationship/knowledge gained through experience, such as in Genesis 4:1, Adam knew (yada) Eve, she conceived, and gave birth to Cain. In Exodus 33:13, Moses wanted God to be gracious to him by teaching him to walk in His way that he and Israel might know (yada) Him, in 1 Kings 2:1-3, God taught how to walk in His wya through the Mosaic Law, and in Matthew 7:23, Jesus said that he would tell those who are workers of lawlessness to depart from him because he never knew them, so the goal of the Mosaic Law is to teach us how to know (yada) God and Jesus, which is His gift of eternal life (John 17:3).
The Mosaic Law is the moral system that God instructed, not something that I created.
In Romans 8:4-7, Paul contrasted those who walk in the Spirit with those who have minds set on the flesh who are enemies of God who refuse to submit to the Mosaic Law.
God is trustworthy, therefore the Mosaic Law is also trustworthy (Psalms 19:7), so the way to trust in God is by obediently trusting in His instructions and it is contradictory to think that we should rely on God instead of relying on His instructions.
Our good works in obedience to the Mosaic Law do not glorify ourselves, but rather they glorify God (Matthew 5:16).
In Colossians 2:16-23, they were keeping God's feasts in obedience to His commands, they were being judged by pagans who were promoting human traditions and precepts, self-made religion, asceticism, and severity to the body, and Paul was encouraging them not to let anyone prevent them from obeying God. This promoting asceticism and severity to the body would be judging people for celebrating feasts, not for refraining from celebrating them.
You are insinuating a lot about me that is not true.