"...that we would be holy and blameless before Him."
* The basic meaning of "holy" is 'set apart', for a particular purpose. When, in eternity past, God set His heart on a multitude no one can number, His purpose was that they be set apart, distinct, to live in a manner worthy of His calling.
Humbled that He should graciously see fit to plan, and then procure, our salvation through the giving of His Son, we are to live holy lives that reflect His holiness (I Peter 1:15-- 17).
In truth, His Name is at stake in our lives.
A watching world instinctively knows that God is holy (Romans 1:19), and looks to see if ones who claim association with Him reflect His character. Do we? Do we avoid every appearance of evil (I Thessalonians 5:22)? Do we have a critical spirit of complaining and/or disputing (Philippians 2:14, 15)? Is our speech continually wholesome, clean, and encouraging (Ephesians 4:29)? The key to a consistent, holy and blameless life is found in the renewing of our minds, which then produces a transformed life (Romans 12:2). And no finer tool for renewing our minds can be found than Scripture, memorized and meditated upon.