Its so real that you step from one realm into another. Now realize, everything that we see, was made by God in the unseen realm of glory. That area is just as real as this one. In order to see the movement of the spiritual realm where God lives, we must cross the threshold of the natural into a living operative faith.
Now faith is the substance of things hoped for, the evidence of things not seen. Heb. 11:1
And what shall I more say? for the time would fail me to tell of Gedeon, and of Barak, and of Samson, and of Jephthae; of David also, and Samuel, and of the prophets: Who through faith subdued kingdoms, wrought righteousness, obtained promises, stopped the mouths of lions, Quenched the violence of fire, escaped the edge of the sword, out of weakness were made strong, waxed valiant in fight, turned to flight the armies of the aliens. Women received their dead raised to life again: Heb. 11:32-35