I'm really not hard to understand but may seem to be so!

I'm not that hard to understand. It is the often and regular backwardness of present day social reality that doth make it seem so.

I don't do tit-for-tat -- the little street jossle, and mode of feigned alarm when the crowd pushes against me as it makes its way to nowhere. I don't hit back in those circumstances. But I do wait. I pay back, in general.

It has always been this way for me: repaying good for good and evil for evil. (If I am behaving toward you in some strange and yet very particular way, check your own record for behaviour toward me in the past.)

What happens to you is a feature of what you, yourself, have somehow decided.