Just as the waters of rivers flow away, these days too will pass; therefore, we should not waste such days in vain.

This couplet reminds us that time flows just like river water, continuously and irreversibly. Once a day passes, it's gone forever, much like the water that has already flowed downstream. Therefore, we should never waste our precious days. It's a gentle call to live mindfully, make the most of every moment, and use our time wisely. Don't let opportunities slip away or spend your days idly. Every single day is a gift, and we should strive to fill it with purpose and meaning, understanding its fleeting nature.