"Stretch your arm no further than your sleeve will reach" nghĩa là gì?

"Stretch your arm no further than your sleeve will reach" = không duỗi cánh tay dài hơn tay áo -> nghĩa là không chi tiêu nhiều hơn số tiền kiếm được; 'liệu cơm gắp mắm'.

Ví  dụ 

This new job doesn't pay as well as my old one, so I'll really have to start stretching my arm no longer than my sleeve will reach.

It's important to learn as early as possible not to stretch your arm any further than your sleeve, or you're going to spend a lot of your life in debt.

Ander: I can get enough money for college if I take out several loans. Mark: I'd advise against it. Stretch your arm no further than your sleeve will reach.