Money is limited and must be earned; not easy to get.
お金は限られていて、稼がなければならない; 簡単には得られません。 (Okane wa kagirateite, kaseganakereba naranai; kantan ni wa eraremasen.)
"You should save more—money doesn’t grow on trees."
"もっと貯金するべきです—お金は木に生えていません。" (Motto chokin suru beki desu—**okane wa ki ni haeteimasen**.)
a general practical principle based on experience
a small but essential part of a large system
to stay mentally focused and motivated
having positive prospects or possibilities
relief after dealing with a stressful situation
to control something or someone secretly