What man actually needs is not a tensionless state but rather the striving and struggling for a worthwhile goal, a freely chosen task.

Viktor E. Frankl (1905 – 1997), Man’s Search for Meaning (p110)

Note: the translation I have is “striving and struggling”, but I’ve also seen it translated as “What man needs is not a tensionless state, but rather a striving struggle for a worthwhile goal.” which I think I prefer.