Men can bear all things except good days. – Dutch Proverb [Quoted in Henry G. Bohn, A Polyglot of Foreign Proverbs comprisin

Human prosperity never rests but always craves more, till blown up with pride it totters and falls. From the opulent mansions pointed at by all passers-by none warns it away, none cries, “Let no more riches enter!” – Aeschylus

Everything in the world may be endured except continual prosperity. – Goethe

As prosperity is promoted, thinking is demoted. – Martin H. Fischer (1879–1962)