I always lock my doors before going outside. I believe all of us do the same to protect our valuable properties from the thieves. I have seen people with more than 3 locks on the door and some also have a specialized integrated alarm system against forceful entry! Some also have 24 hours live monitoring systems built in the house. Then one day I was thinking, it is quite sad that we use so many locks in order to safeguard some belongings, but, we have little or no locks at all in ourselves to safeguard our iman from Shaitan and evils of this world. This iman, which is more precious than any material thing, needs more protection than our belongings.