What does believing God really mean?

Believing God involves a deep, unwavering trust in His character, His promises, and His complete provision for salvation through Jesus Christ. It is not just intellectual agreement but an act of reliance on Christ for all righteousness and justification. In the biblical narrative, such belief is demonstrated by the apostles, as seen when Paul answers the Philippian jailer in Acts 16:31 with an invitation to believe in the Lord Jesus Christ for salvation. This belief undergirds our identity as brethren, relying solely on Christ's work rather than our own efforts.