由儉入奢易，由奢入儉難

it is easy to go from frugality to extravagance; the reverse is not so easy (idiom)

to follow / from / because of / due to / by / via / through / (before a noun and a verb) it is for ... to ...

to follow / from / because of; due to / by; via; through / (before a noun and a verb) it is for ... to ...

to enter / to go into / to join / to become a member of / to confirm or agree with / abbr. for 入聲|入声[ru4 sheng1]

easy / amiable / to change / to exchange / prefix corresponding to the English adjective suffix "-able" or "-ible" / abbr. for 易經|易经[Yi4 jing1], the Book of Changes

extravagant

difficult (to...) / problem / difficulty / difficult / not good

disaster / distress / to scold

frugal / thrifty / needy