What does the Bible say about who we believe in?

In 2 Timothy 1:12, the apostle Paul shows that he is not ashamed because he knows whom he has believed. This underscores the distinction between a belief centered on abstract 'what' or 'how' constructs versus a personal faith in Jesus Christ Himself. Believers are called to look to 'who' saves them rather than merely recognizing the mechanisms or timing of their salvation. This personal relationship with Christ is foundational to historic Reformed theology, affirming that our hope and assurance rest in Him and not in our understanding or experiences.