Meditate On Light Inside Your Mind
In "The Yoga Sutras of Patanjali" verse 2 states, "Yoga Is The Art Of Removing Mind Waves", which is often interpreted as removing thoughts from the mind.
Perhaps it means to balance the light vibration in the mind.
Patanjali was a great sage that lived thousands of years ago. The yoga Sutras he wrote seem to have transcended time remaining one of the most influential spiritual writings in Yoga.
Learn More about the Yoga Sutras