Verse from Hebrews

你们要竭力寻求与众人和睦，并且要竭力追求圣洁。如果没有圣洁，谁也不能见主。(希伯来书 12:14)

Make every effort to live in peace with everyone and to be holy; without holiness no one will see the Lord. (Hebrews 12:14)

What is holy?

One Bible dictionary defines holiness as “separation to God and conduct fitting for those separated.” Author Frederick Buechner said that when writing about a person’s character, “nothing is harder to make real than holiness.” He adds that “holiness is not a human quality at all, like virtue. Holiness is . . . not something that people do, but something that God does in them.”

The pursuit of holiness occurs daily as we yield ourselves in obedience to the Lord instead of following our old ways of self-gratification. 

Yes, we may still fall and sin, but how willing are you to let God change you from the inside out? How willing are u to obey Him daily? It's a journey of trusting and letting God to work inside you day by day.