I remember thinking, out of my own naivety, that that was - great, now I'm done.

我记得出于我自己的天真，我想那太好了，现在我完成了。

I have lost all naivety required for hope in the fleeting pleasures of more or new.

我已经失去了希望所需的所有天真，对更多或新的转瞬即逝的快乐。