The commandment to be holy: How?

The Old Testament often repeated the command to Be holy as the Lord God is holy. The New Testament is clear that this applies to us also (1 Peter 1:16). But how do we become holy in that way? Of course we stay back from sin. I'm here considering times when we have done that, but still do not find ourselves having become a fountain of God-pleasing graceful thoughts, words, and actions. When the New…