Oh, how do I know? (Oh, how does he know?) Oh, how do I know? (Oh, how does he know?) This is how I know: Have faith, hope, and charity. That's the way to live successfully. How do I know? The Bible tells me so. Do good to your enemies, And the blessed Lord you'll surely please. How do I know? The Bible tells me so. Don't worry 'bout tomorrow. Just be real good today. The Lord is right beside you. He'll guide you all the way. Have faith, hope, and charity, That's the way to live successfully. How do I know? The Bible tells me so. Have faith, hope, and charity. That's the way to live successfully. How do I know? The Bible tells me so. How do I know? The Bible tells me so!