YOU SAID:
When going gets tough the tough gets going
INTO JAPANESE
行くことが難しくなると、厳しいことが起こります
BACK INTO ENGLISH
When it gets harder to go, tough things happen
INTO JAPANESE
行くのが難しくなると、大変なことが起こる
BACK INTO ENGLISH
When it gets harder to get there, hard things happen
INTO JAPANESE
そこにたどり着くのが難しくなると、難しいことが起こる
BACK INTO ENGLISH
When it gets harder to get there, hard things happen
That didn't even make that much sense in English.