Always find a reason to laugh. It may not add years to your life but will add life to your years. – Charles M. Schulz
Never attribute to malice that which is adequately explained by incompetence / Nichts Bosheit zuschreiben, was schon durch Inkompetenz erklärt werden kann. – Robert Hanlon’s Razor 1980 (or Heinlein?)
Less is more / Weniger ist mehr – adopted by Ludwig Mies van der Rohe 1947 (1886–1969), earliest source probably Robert Browning in his poem ‘Andrea del Sarto’ (1855; it appears there on the 78th of 269 lines…)