I kept a promised to myself to had a zero cola and tea intake. I kept it for three months but cola was shimmering in my lovely eyes, every time I ate in restaurants. Yesterday, I broke that promised. I couldn't resist my thirst and so I grabbed a glass of cola, gulped it like I was a camel. After that night, I suffered the consequence. My ulcer got aggravated and took meds. I really don't like the feeling. Thus, breaking a promise is not really good.