To center oneself it is best to begin after completing both creating sacred space and grounding, then get into a comfortable posture that can be held for some time without effort. Breathe in, consciously feeling the air pass through the nose, and relaxing the muscles of the body as the air enters and exits the lungs. Envision the particles of the air as though they were clearly visible, being drawn into you, intermingling and exchanging some with the particles of your body, and exiting into a great sea of similar stuff. Take several rounds of breaths continuing this visualization. As though from above, now looking down, create a mental picture of your body peacefully breathing. Slowly begin expanding this perspective of the self and start to include the room or surroundings around you. Floating up easily, your peripheral vision is gaining increased perspective as you rise up safely. Now see the shelter you’ve been in from above the roof as though you have just floated above the upper reaches of where you came from. The outside sky welcomes you as you further float seeing that which is below you begin to open in an ever more expensive outlay. See the neighborhood or area beneath, then the city or countryside, all visible now as you float still further. The landmass begins to become distinguishable as your pace quickens and you rise high into the sky above the low atmosphere. Now the details of the Earth begin to recede. Beyond the atmosphere and into near space you continue traveling at an amazing speed. The solar system passes, the arm of our galaxy, then the entire galaxy, then many, many galaxies, and finally, eternal space. Quietly remain here for the amount of time that feels right to you. Retrace your travel, returning towards Earth as you are ready. Returning to the room your body occupies, and back above your body. Breathe yourself into your nostrils as the particles you know yourself as are here. Fill your body with your consciousness in every cell, now enlivened with the breath and completely within the body. Awaken the muscles by some small movement until you are ready to rise. Stand up as you are called to and stretch your arms in the air, reaching the farthest places as they all touch you.