Entering into a Covenant Relationship with God the Father, what is mandated?

From Adam to Abraham, from the Covenant of Law to the Covenant of Grace, one’s “faith” in God has been “KEY” to establishing covenant relationship with Him (See Hebrews 11). Though God gave Israel’s children the ceremonial laws, dietary laws, the Decalogue, and commanded them to obey these rules and regulations, these laws only foreshadowed and expressed Israel’s need for the coming Messiah and pointed Israel’s children to a coming Redeemer who would keep those laws with perfection and justify and sanctify the one who “believes” in Him by faith (Galatians 3:24).

In the New Covenant, it is “faith” that remains “key” to establishing Covenant Relationship with God the Father; that is, faith in the Son, Jesus Christ, as Messiah-Redeemer-Savior-Intercessor who shed His innocent blood upon a Roman Cross at Golgotha to pay the sin-debt of humanity and reunite God and man by eradicating the chasm of sin. Faith, that is, believing that God is true and that God will do exactly as He has promised in His written word and through His Living Word, Jesus Christ, is the only Way to the Father’s heart and the only Way to an eternal Covenant Relationship sealed and guaranteed by the indwelling Holy Spirit (John 14:6; Ephesians 1:13-14).