Humans have color vision because our eyes contain three types of cone cells. One cone helps us see blue, another to see green, and the third to see red. This is called trichromatic vision. The brain combines signals from these three types of cones to perceive a wide range of colors, allowing humans to distinguish millions of different colors from periwinkle to chartreuse.

There is, however, a rare breed living among us called tetrachro¬mats. They possess a fourth cone, allowing them to see a hundred mil¬lion colors that are invisible to the rest of us. For every color a trichromat sees, a tetrachromat perceives a hundred hues!

I can't help but wonder if we'll get a fifth cone in heaven, enabling us to perceive a billion colors. Or perhaps a sixth, seventh, or hun¬dredth cone! By earthly standards, we'll have extrasensory perception. Everything will smell better, taste better, sound better, feel better, and look better. With our newly glorified senses, we'll hear angel octaves.

Remember when Elisha was surrounded by the Aramean army? He said to his very confused assistant, "Those who are with us are more than those who are with them." Elisha prayed that the Lord would open his servant's eyes, and it's almost like God created an extra cone. "He looked and saw the hills full of horses and chariots of fire all around Elisha."

Possible Preaching Angle:
If our spiritual eyes were opened, what would we see? We'd see what's really happening! We'd see guardian angels, as the scriptures describe them ministering to those who will inherit salvation (Heb. 1:14). We'd discern the manifest presence of God, perhaps like Moses who encountered God's glory on the mountain or Isaiah in God’s throne room (Exod. 33:18-23; Isa. 6:1-7). We'd perceive powers and principalities, those unseen forces at work in the world, as Paul warns us about (Eph. 6:12).