a light purse makes a heavy heart
1. Proverb Not having enough money can cause one to suffer a lot of stress, worry, and unhappiness. I know you can't comprehend why there's so much depression, anxiety, and anger in this part of the country, but that's because you've never been forced to live in poverty. If you had, you'd understand that a light purse makes a heavy heart.
2. Proverb By extension, one should not spend their money frivolously or wastefully, lest it lead to one's unhappiness. I know you're excited to go to the casinos on your trip to Las Vegas, but be careful how you handle your money—a light purse makes for a heavy heart.