What does it mean to have faith in the mystery of the gospel?

The mystery of the gospel, as discussed in Romans 16:25-27, refers to the profound truths about God’s plan that were hidden for ages but are now revealed through Jesus Christ. Believing in this mystery means acknowledging that human understanding is limited and that we are to rely on divine revelation. This faith leads to obedience, as stated in the text, as we respond to God's grace with trust and submission. The mystery encompasses the reality of Christ's life, death, and resurrection, affirming that salvation is a work of God that requires our faith in His revealed truth.