John Wesley on Deuteronomy 29:19

Of this curse - Of that oath where - in he swore he would keep covenant with God, and that with a curse pronounced against himself if he did not perform it. Bless himself - Flatter himself in his own eyes, with vain hopes, as if God did not mind such things, and either could not, or would not punish them. Peace - Safety and prosperity. My own heart - Though I do not follow God's command, but my own devices. To add drunkenness to thirst - The words may be rendered, to add thirst to drunkenness, and so the sense may be, that when he hath multiplied his sins, and made himself as it were drunk with them, yet he is not satisfied therewith, but still whets his appetite, and provokes his thirst after more, as drunkards often use means to make themselves thirst after more drink.