Comfort. To some, it is inner peace, a state free of pain and suffering, an assurance that keeps us safe. To others, it is the moment we stop growing, the moment we turn down opportunities, the moment we stop living our lives. Comfort is a luxury many people hope for, but it is also a sign of stagnation if we let it take over our lives entirely. In the experience of Yubing Zhang, "life begins at the edge of your comfort zone". So push yourself, because you never know what heights you will achieve.