God’s holiness isn’t simply the absence of defilement, a negative thing. The holiness of God is positive and active. It’s God’s perfect nature at work in accomplishing God’s perfect will.
Wiersbe, Warren W. (2010-11-01). Be Holy (Leviticus): Becoming “Set Apart” for God (The BE Series Commentary) (p. 17). David C Cook. Kindle Edition.
Locusts and Wild Honey 
And God is active in calling us to be active. Spurgeon has an excellent sermon on holiness where he notes, ” it is a dangerous state of things if doctrine is made to drive out precept,** and faith is held up as making holiness a superfluity. ”
http://spurgeonwarquotes.wordpress.com/2013/01/08/a-call-to-holy-living-spurgeon/