In Haggai 2:21 God says, "Speak to Zerubbabel governor of Judah, saying, `I am going to shake the heavens and the earth."
Are you old enough to remember a kid’s toy called, "Etch & Sketch?" It was a screen filled with iron flakes which could be manipulated by a stylus-like magnet or turn knobs to write any word or create any image the artist could draw. If the image was not done as well as the artist envisioned, or the words no longer were relevant to the moment, with one big "shake" the iron flakes could be de-magnetized from the screen erasing the image completely.
Application: Words and images which have wrongly defined us need to be erased. Sometimes the only way for God to get them off the screen of our hearts is to "shake" really hard.
So, if improper images have overpowered you, hold on and get ready! God is about to do some shaking. Afterward, He will permanently "etch & sketch" His will on the tablet of your heart. Live right, live well...