What does the Bible say about the disciples not understanding Scripture?

In John 20:9, it is noted that 'for as yet they knew not the scripture, that he must rise again from the dead.' This lack of understanding highlights the disciples' limited comprehension of the necessity of Christ's death and resurrection at that moment. Throughout their time with Jesus, they struggled to grasp His teachings about His coming suffering, burial, and rise. Their expectation of an earthly kingdom obscured their recognition of the deeper spiritual truths that His work required. Their journey of faith showcases how salvation isn't merely about knowing facts but deeply knowing Christ Himself.