初衷 的英文怎麼說?

[1] just like we set out to do[2] motive in the first place[3] original goal[4] lifelong goal[5] things we set out to do

初衷指最初的目的，白話翻譯就好，original goal 就行了，但「我改了初衷」怎麼說？I've changed my mind 就行了。

另一個翻譯是 we set out to do:

Just like we set out to do. = 就像實現我們的初衷一樣

things we set out to do = 我們的初衷 = 我們一開始想做的事情

我改了初衷 = I've changed my mind

lifelong goal = 人生目標