If you are not arrogant and impetuous, accumulating wealth means not being proud, and raising your spirit to accumulate strength; Be prepared for danger in times of peace, and save your strength is similar to these two, so in other words, be prepared for danger in times of peace and save your strength.

To accumulate a lot of money is to save a lot and let it out slowly. It describes that only when you are fully prepared can you do a good job. It's from Send to Zhang Hu.