We like to think we make rational decisions with our money, but what if our emotions influence our financial choices far more than we realize? That’s one of behavioral economics' central findings: human psychology shapes financial decisions. While these discoveries have challenged traditional economic thinking, they reinforce what Scripture has taught for thousands of years: human wisdom is limited, our hearts can deceive us, and our emotions don't always lead us in the right direction. Mark Biller, Executive Editor and Senior Portfolio Manager at Sound Mind Investing (SMI), believes understanding these tendencies can help Christians become wiser, more disciplined investors.