It's not a myth - it's real!
Remember the phrase "you become what you see?" By opening your 3rd eye, you'll be able to see much more than your physical eye can.
Opening your 3rd eye doesn't mean you'll magically get a third eye in your forehead (duh!). But you do get another eye in the sense that you can now sense the energy around you!
You'll become more hyperaware of your surroundings and as such, your intuition will greatly improve over time.
Because you're seeing more than the naked eye can perceive, you'll be filled with insight that normally isn't available.
Once your 3rd eye is open, you'll be able to feel the universe's energy channel through the Earth.
You'll start seeing things in a different light. You'll feel more vibrant as a result and feel more confident in your everyday life.