During a float, you produce slower brain-wave patterns, known as theta waves, which are normally experienced only during deep meditation or just before falling asleep and when waking up.
It’s during these moments that we experience sudden flashes of insight and other vivid imagery. We’re not saying you’ll figure out the meaning of life, but floating may get you there faster than years of devoted meditation (it’s more comfortable too).
You may find yourself humming a melody that later becomes the coda to your opera. Or maybe you realize that the last line of your short story is the first line of your novel. Floating can put you in that state of reverie that taps into your creative self.