it's all in the mind; everything depends on your attitude
Proverbial expression meaning that one's mindset or perspective determines how a situation is experienced.
同じ仕事でも、気は持ちようで楽しくも苦しくもなる。
Even the same job can be enjoyable or painful depending on your mindset.
気は持ちようだから、前向きに考えよう
It's all in the mind, so let's think positively.
Standard kanji spelling for this idiomatic expression.
Alternate kanji spelling using 様; less common.
A set phrase combining 気 (mind/spirit), は (topic marker), and 持ちよう (way of holding/handling). The exact origin is uncertain, but it reflects a common Japanese cultural emphasis on mental attitude.