Tell me Why???

Can someone tell me why it is when you KNOW you are in a vulnerable state, you look at the one thing you KNOW will attempt to push you over the edge? Seriously, it astounds me how we can self-inflict our own pain sometimes. I could be talking about being on a diet and walking down the candy aisle. I might be talking about grieving the loss of a loved one and walking into their room. What I really need to do right now is quit talking (typing) and start praising the One who can redeem all hurt into a testimony that glorifies Him and THAT IS WHAT THIS NEEDS TO BE ABOUT.