Hi LAB328,
I've just read through your essay and found it rather difficult in the beginning. The essay is quite short and sometimes the structure is not quite clear. I would recommend to use paragraphs because that makes the reading a lot easier.
Let's go through your essay. At the very beginning you use
This saying is stating that
, for the reader, however, it is not obvious what you are talking about. It would be better if you would include the saying in your statement. For example: "The saying 'haste makes waste' is stating that..."
making a quick decision means that it's not very thought out, and that it hasn't been checked from all its aspects
In this statement I would change the word choice: "not very thought through" and "hasn't been looked at from all perspectives".
Consequently, leading to a probable bad end result.
There is something missing in this sentence. There is no subject, so you have to refer to the preceding sentence somehow. For example: "Consequently, this is leading to a bad result" - omit the "end" here.
In another word, if this person had waited and thought his decision through he wouldn't have missed out on the job opening in the same firm, but at a different position.
I think you mean "in other words". Furthermore, the last part of the sentence is ambigious. What do you mean by "but at a different position"? The job opening? I think, I would just leave this out.
Not to mention, that hasty decisions, not only goes to waste,...
Decisions is plural, so you have to use "go" instead of "goes".
To put it differently, is that after this person has quit his job and became unemployed.
You can't start over with "is" in this case. "To put it differently, after quitting his job this person became unemployed." In fact, "to put it differently" means to say the same thing in other words. I don't think that's the case here so you should probably use a different phrase.
Generally I think, you have some good points, Just make sure that you develop your arguments a little further and that you have a clear introduction and conclusion. I like the fact that you sticked to your first example throughout the essay. I only had the feeling that you could express the single arguments a little stronger and again: the conclusion and introduction don't seem very clear.
I hope this helps,
RedFire