Zazen is a Buddhist practice to settle your mind into its original state of purity and clarity, so that you can see everything in the world as it is.
This article explains how to sit in the zazen posture.
Clothing
In zazen, loosen up anything tight around the waist and wear non-binding clothing.
Full-Lotus Position
Put one foot with the sole up on the opposite thigh, then place the other foot with the sole up on the other thigh. This is the best posture but difficult for beginners.
Half-Lotus Position
Put one foot on the opposite thigh, while the other leg is tucked under. Easier than the full-lotus position.
Burmese Posture
Fold your legs, but lay them on the pad without placing them on the opposite thigh.
Seiza Posture
Kneel with your buttocks resting on your upturned feet. You can use a pillow or a small bench for comfort.
Stable Posture
Ensure both knees touch the pad for stability. If needed, place a small cushion or towel under your knees.
Hand Position
Close the right hand around the thumb of the left hand and cover the right hand with the left. Rest hands in front of your belly, keeping shoulders relaxed.
Upper Body Posture
Bend your upper body forwards at a 45-degree angle and push your buttocks backward to ensure natural positioning. Then, bend left and right three times before returning to a straight position.
Final Posture
Push the lower back forward slightly and stretch your back to sit upright.