Merton from Thoughts In Solitude:
If you want to have a spiritual life you must unify your life. A life is either all spiritual or not spiritual at all. No man can serve two masters. Your life is shaped by the end you live for. You are made in the image of what you desire.
To unify your life unify your desires. To spiritualize your life, spiritualize your desires. To spiritualize your desires, desire to be without desire.