Business is the salt of life.

The proverb presents purposeful activity as something that makes life more satisfying, much as salt brings out the flavor of food.

It values having work or other worthwhile occupations to engage with, suggesting that life may feel duller when there is nothing to do.

Use it to express appreciation for the interest and satisfaction that come from being occupied, particularly when contrasting purposeful activity with idleness or boredom. “Business” need not mean commerce alone.