Which verse emphasizes that holiness is a standard for God's people?

Hebrews 12:14 specifically underscores the importance of holiness as a standard for God's people. The verse states, "Follow peace with all men, and holiness, without which no man shall see the Lord." This verse highlights that holiness is not just an option but a critical requirement for believers in their relationship with God. It emphasizes that achieving a state of holiness is essential for being in the presence of the Lord, thereby reinforcing the expectation for Christians to pursue a life that reflects God's character and righteousness.

In contrast, the other verses, while important in their contexts, focus on different themes. Matthew 5:8 speaks about the blessedness of the pure in heart, which relates to internal righteousness but does not explicitly establish holiness as a standard. 1 Peter 3:15 encourages believers to be prepared to give an answer for their hope but centers on the concept of witnessing rather than holiness being a requirement. James 1:22 emphasizes the importance of not only hearing the word but also doing it, which highlights action and obedience but doesn't specifically address holiness as a standard.