disappointed but having learned from the experience
разочарован, но извлек уроки из опыта (razocharovan, no izvlek urokov iz opyta)
"After that mistake, she was sadder but wiser."
"После этой ошибки она была более печальной, но мудрой." (posle etoy oshibki ona byla **sadder but wiser**.)
to suddenly start talking about something unrelated
to be brave enough to have big ambitions
the truth will eventually be revealed
naturally inclined or designed to succeed
a complex problem that may cause more trouble once started
to reduce the time needed for something