We seem to have the habit of claiming that we know what is best for us. We try to convince our self that what we desire is always right. The fact is, we don't always know what is best and right for us. Our selfishness and sinful nature make demands for God to bend His purposes to suit our own desires.
When we push our way, God sometimes grant what we desire although it's never His will. He may allow us the things we desire in order to realize that these are not for our own ultimate good. God always seek our obedience and free choice.
Things we desire and receive can go sour. As it happens, God pursues us. He helps us to better discover and follow His purposes and ways. And when we do, we learn the lesson of valuing of what is truly important and eternal in this life.
"Therefore, I urge you, brothers, in view of God's mercy, to offer your bodies as living sacrifices, holy and pleasing to God - this is your spiritual act of worship." (Romans 12:1)
"Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is -- His good, pleasing, and perfect will." (Romans 12:2)