Good

There's a saying in Malays that says 'Careful on doing good, Never do bad' (Google translate have much more worse translate than mine) which why I am talking about the good one not the bad one since talking about bad is too mainstream! So why you should be careful on doing good? I myself have been there several of times. From my shallow experience, doing good doesn't really repaid by good. I am a karma believer so they say. It is like when you tried to do good on some person for example this john doe, you would expect he would do the same thing to you. And right there, right over there hope comes to you. Do you know that hope is man best killer either body or soul? Even though it is not really proven by science and all that shit but all I can say hope kills me several times before but hey? You learn from that. So chill the fuck out! But as they said, preventive is the best cure of all problems in this world. 

You prevent that from coming, you are most likely save but heck shit happens every time!