The Cross Road of Should & Must

"When we choose Should, we're choosing to live our life for someone or something other than ourselves. The journey to Should can be smooth, the rewards can seem clear, and the options are often plentiful...Must is different. Must is who we are, what we believe, and what we do when we are alone with our truest, most authentic self. That which calls to us most deeply. It's our convictions, our passions, our deepest held urges and desires unavoidable, undeniable, and inexplicable. Unlike Should, Must doesn't accept compromises."

http://www.dailygood.org/story/1066/the-crossroads-of-should-and-must-an-intelligent-illustrated-field-guide-to-finding-your-bliss-maria-popova/