Why is union with Christ essential for salvation?

The concept of union with Christ is foundational to Reformed theology. Without this vital union, Catholics and others deny true communion with the Savior, which is necessary for salvation. As explained in the sermon, believers are intricately linked to Christ, allowing them to receive His righteousness, live in His grace, and ultimately share in His glory. This means that the blessings God bestows upon His Son extend to those who are united with Him, demonstrating that all spiritual blessings are found in Christ alone.