初しょ心しんに返かえる

expression, godan verb (-ru)

return to one's original intention; recall one's initial purpose

Used when someone goes back to the mindset or motivation they had when they started something, often after losing focus or becoming complacent.

• 仕し事ごとに慣なれてきた今いまこそ、初しょ心しんに返かえって頑がん張ばりたい。

  Now that I've gotten used to the job, I want to return to my original intention and do my best.

• 彼かれはスランプに陥おちいったとき、いつも初しょ心しんに返かえるようにしている。

  When he hits a slump, he always tries to go back to his original purpose.