Time is one cost, but ignorance is the other; "Smart People" (and the above is an example) often are not only knowledgable, but actionable, across a variety of

Time is one cost, but ignorance is the other; "Smart People" (and the above is an example) often are not only knowledgable, but actionable, across a variety of subjects. Leading to unhappiness is frustration that others choose not to or are otherwise incapable of this knowledge or action. But especially when you hear "I wish I could do what you do" from people who have had more impetus, more opportunity, or have invested more than you.