Pious Words, Corrupt Heart
All commentators agree that Balaam's words, while sounding righteous, likely masked a corrupt heart. He declared he couldn't disobey God for a house full of gold, yet as John Gill and Matthew Henry note, his subsequent actions show he was hoping God would change His mind so he could get the reward. This serves as a powerful warning that spiritual-sounding language doesn't always reflect a heart aligned with God.