If anyone wants a way to conceptualize this, imagine your mind as an antenna.  It receives different frequencies of energy that formulate your reality, such as light waves and sound waves.  You are capable of altering the frequency you tune your reality to, thus capable of sensing information from alternate dimensions that you would not normally be aware of.  If your mind is opened to all frequencies of the universe at once, you'll experience a state of white energy/light, as people have recalled during near death experiences.  Just as the color white is created by the presence of all colors.  This state of awareness may also be experiences consciously through meditation and is referred to egodeath.

The more you believe you can control your mind, the better you will be able to channel through different dimensions.  At the rate humans are exponentially evolving, there will come a day when physical time travel will become beyond the realm of imagination and into the realm of possibility.

Albert Einstein