Here is my argument from Scripture. But does the Heidelberg Catechism agree.

Here are two questions and answers from the Heidelberg Catechism:

Q 1. What is your only comfort in life and death?

That I, with body and soul, both in life and death, am not my own, but belong unto my faithful Savior Jesus Christ; who with his precious blood has fully satisfied for all my sins, and delivered me from all the power of the devil; and so preserves me that without the will of my heavenly Father not a hair can fall from my head; yea, that all things must be subservient to my salvation, wherefore by his Holy Spirit he also assures me of eternal life, and makes me heartily willing and ready, henceforth, to live unto him

Q 94. What does God require in the first Commandment?

That, on peril of my soul’s salvation, I avoid and flee all idolatry, sorcery, enchantments, invocation of saints or of other creatures; and that I rightly acknowledge the only true God, trust in Him alone, with all humility and patience expect all good from Him only, and love, fear, and honor  Him with my whole heart; so as rather to renounce all creatures than to do the least thing against His will.

Of course this warning only makes sense since the Law of God demands of us faith in Jesus Christ.