"Beware of not acting upon what you see in your moments on the mountaintop with God. If you do not obey the light, it will turn into darkness. "If therefore the light that is in you is darkness, how great is that darkness!" ( Matthew 6:23 ). The moment you forsake the matter of sanctification or neglect anything else on which God has given you His light, your spiritual life begins to disintegrate within you. Continually bring the truth out into your real life, working it out into every area, or else even the light that you possess will itself prove to be a curse.
The most difficult person to deal with is the one who has the prideful self-satisfaction of a past experience, but is not working that experience out in his everyday life. If you say you are sanctified, show it. The experience must be so genuine that it shows in your life. Beware of any belief that makes you self-indulgent or self-gratifying; that belief came from the pit of hell itself, regardless of how beautiful it may sound."

This is a snippet from http://www.rbc.org/utmost/index.php "My utmost for His Highest". (Thanks AL for the website, been wanting to get my hands on that book:)

What a wake up call for myself. Have i been living off yesterday's experience? how much do i live out the truth of God in my life? what i mean is daily, consistent, non-fluctuating biblical lifestyle, speech, and the hardest of all thoughts. have i ever been too proud to admit of my falls and held up a mask that covers it all? The words rung in my mind as i read it: "...The most difficult person to deal with is the one who has the prideful self-satisfaction of a past experience, but is not working that experience out in his everyday life. If you say you are sanctified, show it. The experience must be so genuine that it shows in your life. Beware of any belief that makes you self-indulgent or self-gratifying; that belief came from the pit of hell itself, regardless of how beautiful it may sound..." God, let my life be one of genuineness.