Proverbs 25:4
When we think of fine jewelry, we always want the best. The purer the silver or gold, the happier we are! No one wants a cubic zirconium ring - for they know, even if others don't, that the ring is a fake. And the sentimental attachment diminishes with impurity.
The same is true with our lives. While we may not enjoy the process, God strives to drive out the impurities in our life so that we may be more appealing to our Saviour. Paul describes it best in 2 Timothy 2:20-22:
But in a great house there are not only vessels of gold and of silver, but also of wood and of earth; and some to honour, and some to dishonour. If a man therefore purge himself from these, he shall be a vessel unto honour, sanctified, and meet for the master's use, and prepared unto every good work. Flee also youthful lusts: but follow righteousness, faith, charity, peace, with them that call on the Lord out of a pure heart.
God does not desire for us to be wooden vessels of dishonor but rather vessels of the purest silver and gold. And the only way we can achieve this feat is to pursue the traits listed by Paul above. As we purify ourselves, we become more valuable to our savior. As we become more valuable, we will be used more to accomplish His will. While the purification process is painful, the gain is much more than can be imagined in this life alone!