Be industrious. Work is not always pleasant. But few are unhappier than those who lead a purposeless, idle and bored existence: children gloom to their mother when they have nothing to do; the low-mindedness of the unemployed, even when they are on "relief" or on the "dole" is legendary; the retired man, with nothing further to accomplish in life, perishes from inactivity, as shown by statistics.

L. Ron Hubbard