"A man must bless God for the evil, just as he blesses Him for the good." ~~ Berakhot 9:5
"Who cries over the past is offering a vain prayer." ~~ Berakhot 9:3
"None should stand up to pray save in sober mood; the pious men of old used to wait an hour before they said their prayer, that they might direct their heart toward God." ~~ Berakhot 5:1