People struggle a lot in building physical endurance, but they pay no attention in building mental stamina. We have to go through countless tasks throughout the day. Be it at work, at home or at any place we visit. Some chores are simple and are dealt automatically, but few require extra attention, thoughtfulness and intelligence. You need more tolerance if your workplace is dull with never changing atmosphere. Same goes if you have a demanding boss. Equal mental power is required to deal with your children or elderly parents.