Mindfulness of the body that is full of pleasure. <em>What one thing should be completely understood?</em> Contact, which is accompanied by defilements and fuels grasping. 2. Groups of Two Two things are helpful, two things should be developed, two things should be completely understood, two things should be given up, two things make things worse, two things lead to distinction, two things are hard to comprehend, two things should be produced, two things should be directly known, two things shou