오늘 수능 외국어 영역 한 문제

풀 수 있으신가요?  전 답은 대충 맞췄는데 문장 해석이 참 토나오는 군요. 모 커뮤니티에서 처음 봤는데 토익 900점 이상 맞은 사람들도 gg쳤다는...

So far as you are wholly concentrated on bringing about a certain result, clearly the quicker and easier it is brought about the better. Your resolve to secure a sufficiency of food for yourself and your family will induce you to spend weary days in tilling the ground and tending livestock; but if Nature provided food and meat in abundance ready for the table, you would thank Nature for sparing you much labor and consider yourself so much the better off. An executed purpose, in short, is a transaction in which the time and energy spent on the execution are balanced against the resulting assets, and the ideal case is one in which _____________________________. Purpose, then, justifies the efforts it exacts only conditionally, by their fruits. 

① demand exceeds supply, resulting in greater returns
② life becomes fruitful with our endless pursuit of dreams
③ the time and energy are limitless and assets are abundant
④ Nature does not reward those who do not exert efforts
⑤ the former approximates to zero and the latter to infinity