SYNOPSIS   It is an opportune moment to delve into the practice of Sujuy Tukul or Essence of Thought, a system of the ancient Mayans for the full development of the human being; It is equivalent to Yoga, in a certain way, but with a conception proper to the vision of our wise ancestors, a conception centered on the Being, on the Spirit, but without neglecting its instrument and temple, which is or should be the body. By the essence of thought we understand the cultivation of the atrophied, unused area of the brain, so that it serves as a channel for the higher powers of the mind; and our energy corresponds to the ninth house, house of the superior mind, unlike the third house, opposite, which corresponds to the practical mind, which is the most cultivated so far by the predominant human type in the Society.