April 12

…how often we seem to forget the clear and repeated warnings of our beloved Master, who, in particular during the concluding years of His mission on earth, laid stress on the “severe mental tests” that would inevitably sweep over His loved ones of the West—tests that would purge, purify and prepare them for their noble mission in life. 
(Shoghi Effendi, from a letter dated November 14, 1923; ‘Baha’i Administration’)