"Indifferent to your ambition, stay quiet and stay away" comes from the "Three Kingdoms Shu Zhuge Liang Family Instructions". The original sentence is: "Indifferent to your ambition, not far away if you are not quiet."

It means:

If you don't pursue fame and fortune, you can make your interest noble, your mentality stable and quiet, and you can set (achieve) lofty goals without being influenced by other thoughts.