According to Patanjali and the Yoga Sutras, the last of the yoga precepts is Ishvara Pranidhana. Translated many ways, the one I use the most is “surrender” or “letting go”. Here is a great way to help students understand the concept:
Using partners, have one student move into Maricyasana III. Maricyasana III is a twist in which one leg is straight out and the other is bent with the foot next to the thigh. Then you twist into the bent knee. Have the student twist to the right first, into the right knee. Have the partner place her hands on the front of the right shoulder and on the left shoulder blade. Get a good solid grip so the student in the pose gets a good feeling of being completely supported. Now, have the student in the pose release and allow the partner to support her. It is much trickier than it looks and is a great lesson in learning surrender. Those who tend toward control in their life will keep holding themselves in the pose and not be able to release into their partner's hold as well as those who can surrender or let go and trust well.