what getting a CREDIT means

I received a CREDIT for my first written assignment after taking a 7-year break from school. Bad call.
Because I didn't grow up like regular people, I was late in doing my Bachelors - had to finish the school of hard knocks, before working on my academic qualifications, after all, I always did things in the reverse order. I remember Cross-Cultural Psych was the first module I had to do as a mature student, juggling work and home. I got a Credit for that paper - and I remember how I was ragged by my soul-pal - he was a doctor, no less, who did a minor in Psy. He went on and on about the shoddy work I probably handed in and that I deserved that awful grade. He didn't want to hear about how long it's been since I left school and that writing was a struggle. He just let it on - but that one session, made me more responsible, and I made it to the Honour roll after 3 years.
NOW, history is repeating itself again. I got another CREDIT for a start.
A very good friend told me to move on, and not to dwell. But I'm in Dwell Hell - because I handed in this work knowing very well it was deserving of only a CREDIT. My Professor left me a long love note - I was reluctant to read it, not wanting to know just how pre-school my paper probably came across to him - so I kept it in my bag, after flipping through the pages and making mental notes of his scribbles - having half the mind to email him to say that he should sharpen his pencil before insulting me, because at least I know he took the trouble to also be presentable!
BUT after a shower and coffee, I decided to grow up and face the scribbles.
To my surprise, he commended me on my supporting research materials and that I needed to hit the supporting argument RIGHT ON THE NAIL - what I didn't do was to wrap up the argument - I brought it up, but did a lousy job on the finish.
Although I'm still in DWELL HELL - it's probably hell on an elevated plane, because Prof did give me some insight into what I had forgotten & what I needed to oil so that the gears are working smoothly.
So, I'm not mad at him anymore, he's not on my hit list.
I deserved that Credit.
He did a good job setting it right and that's why he's the most talked about Professor in Psych school.

Bottom Line: This is graduate school and we should never submit sub-standard papers if we are expecting a good overall GPA.