Meditation is the central practice of spiritual development. Through meditation, the consciousness awakens and develops.
"To commence with the study of the technique of meditation is to enter into the antechamber of the divine peace that surpasses all knowledge." - Samael Aun Weor, The Revolution of the Dialectic
"Meditation should for the basis for compassionate action, for seizing the opportunity to do something. The meditator''s motivation, his sense of universal responsibility, should be expressed in deeds." - The 14th Dalai Lama
There is abundant information here about the precise science of meditation, whether from the persepective of Yoga, Buddhism, Taoism, or other traditions.
"We should not mistake the Truth with opinions. Many think that the Truth is this or that, or that the Truth is within this or that book, or within this or that belief or idea, etc. Whosoever wants to experience the Truth should not mistake beliefs, ideas, opinions and theories with that which is the Truth. We must experience the Truth in a direct, practical and real manner; this is only possible in the stillness and silence of the mind, and this is achieved by means of meditation."