Why takes so long to change

http://gracelookingback.wordpress.com/2012/10/05/god-at-work/

And, of course, the roots of that sin are wrapped around many others. So God begins to work way down deep on the whole complicated mess – separating out, discarding, disentangling. Little by little. Weed by weed. Layer by layer. Slowly but surely, he goes ‘up’ until he reaches the surface level – the level at which you prayed – and you can see the results. Long after you expected them.