How do we know that God requires holiness from us?

God's requirement for holiness among His people is made clear in several biblical texts. In 1 Peter 1:16, it states, 'Because it is written, Be ye holy; for I am holy.' This command emphasizes that God's nature is the standard for His followers. The expectation of holiness is integral to the believer's life and is not merely a suggestion but a divine imperative. Moreover, the holiness of God revealed in the Old Testament, where His justice demands perfection, underscores the absolute need for His people to reflect His attributes. Through our union with Christ, we are made holy and justified before God, but this status carries a responsibility to live in accordance with that holiness.