He knew too much. Never mistake knowledge for wisdom. If riding in an airplane is flying, then riding in a boat is swimming. If you want to experience the element, get out of the vehicle.
Some people develop eye strain looking for trouble.
The only weapon that becomes sharper with constant use is the tongue. If you sing country music backwards, you get your job and your wife back. Someone who thinks of himself as a wit is usually half right. A baby is the most complicated object made by unskilled labor. Before Xerox, five carbons were the maximum extension of anybody's ego.