It's hard; but it can be done. I attempted it several times, and eventually managed it 39 years ago after many years of a 40-a-day habit. There is just an optimum moment which one must seize; and then avoid the "I've been without for a month, so I'll just have one to show I can without becoming addicted again", which is disastrous. But anyone with enough willpower can give up.

~M~