One of the central themes in 'The Richest Man in Babylon' is the importance of saving a portion of your income. The book emphasizes that by consistently setting aside at least 10% of your earnings, you can build a substantial financial cushion over time. This principle is illustrated through the story of Arkad, the richest man in Babylon, who attributes his wealth to his disciplined saving habits.

Another key idea is the importance of making smart investments. The book advises against risky ventures and encourages readers to seek advice from knowledgeable and experienced individuals. By investing wisely, you can grow your savings and create additional streams of income. The parables highlight the significance of due diligence and the dangers of falling for get-rich-quick schemes.

The book also stresses the importance of living within your means. It teaches that financial success is not just about how much you earn, but also about how much you spend. By controlling your expenses and avoiding unnecessary luxuries, you can ensure that you have enough money to save and invest. This principle is exemplified through various characters who learn to manage their finances more effectively by prioritizing their needs over their wants.