We are the only species on this planet that enjoys thrilling and life-threatening activities. When animals feel a sense of possible death, instinct tells them to avoid it. But humans have a fascination with danger. Reason tells them that they could get killed or drive off of the freeway. But the fact that danger is so close provides a kind of rush and excitement, and the illusion that we are taking control of our death rather than letting it hit us unexpectedly.
Destructiveness is the outcome of unlived life.
Not acing some boring general education class that you forget as soon as you put down your pencil after the final. Not joining an organization for the sake of popularity and belonging. Not struggling to earn a living in a job you hate. Not settling down with an attractive, yet dull spouse and raising 2.5 children. Instead, living is studying something you feel passionate about and find stimulating.