Let me first express how I feel so bad about being a jerk to my mail lady. I didn't say thank you to her or even acknowledged her when she said "thank you" to me and I feel really bad... I am such a jerk at times.
I could honestly say that I could never do any bad will to anyone who doesn't deserve it because my conscience will eat me for days. I don't know if having a strong conscience is a strength or a weakness, but one thing's for sure: I have a conscience.
Wikipedia defines conscience as "an aptitude, faculty, intuition, or judgment of the intellect that distinguishes right from wrong" and is "described as leading to feelings of remorse when a human does things that go against his/her moral values, and to feelings of rectitude or integrity when actions conform to such norms."
I find having a good conscience as a strength because it helps me in making the right decisions and it protects me from the severe consequences of wrong decisions. Having a conscience is only a weakness when every one else doesn't have one. You'll end up being eaten, chewed, and spitted out by immoral people. Nevertheless, I try having a good balance with my conscience. I will follow the golden rule, "One should treat others as one would like others to treat oneself". Although the platinum rule ("people should treat others as those others would like to be treated") is better, my moral fibre isn't strong enough. I still prefer the "eye for an eye" logic.
Photo credits to David Tanguay