We are, to a great measure, victims of an age that is certainly not apathetic to seeking its own pleasure but is apathetic about having a true relationship with God. Would anybody in all honesty not care to eat or to have fellowship with Jesus Christ? Yet, verse 20 says He is standing at the door and knocking, and He will come in and dine with them if they just open the door.
Many would like to eat and fellowship with Christ just to say that they had that novel experience. But the irony here is that God is seeking His people, and they are too uncaring to even rouse themselves to answer the door! The message to this church shows that the problem is that they are so far from Him they are not even aware of their spiritual need and thus have no desire to be near Him. No desire, no prayer. No prayer, no relationship. No relationship, no awareness of spiritual need. It goes in a vicious cycle.
God is hoping that He can stir us up enough to repent and to break out of the cycle. He says, "Repent. Be zealous." Zeal indicates heat, passion, and feeling. He is hoping to break us out of this circle by rekindling an awareness of our spiritual need.
An awareness of need resides in us because we are close enough to Him to see how holy, gracious, kind, merciful, and good He is and desire to be like Him. In other words, we admire Him so much and respect His personality and character so much that we want to be near Him—right across the table from Him, as it were. We do not want to be near Him just to have a novel experience but to exalt Him and honor Him by being like Him. Is not imitation the most sincere form of praise?