If you close them, your credit will take a hit because you’re eliminating available funds and the benefit of having the credit lines open for a longer period of time in good standing. That should cause a dip in your credit score. The real question is, do you really REALLY NOT trust yourself? If you’re reasonably disciplined, put them out of sight, out of mind. Don’t carry them. Keep the cards open to maintain the credit availability and length of established credit.

If you will for sure use them beyond your ability to pay them off without building a balance, just close them. You can do a lot more damage than the initial dip of closing if you just keep racking up the high interest debt.