Can I have a do-over?

Discretion is the better part of valor, or so it is said. But what has valor to do with what I say? Valor is defined as "strength of mind or spirit that enables a person to encounter danger with firmness; personal bravery" I see the sadness in my friend's eyes, and I know I put it there by my words. I wish I could take them back. Do no harm. Something to aim for. And meanwhile, regret at words spoken doesn't sit very well in my belly.