Ambitious VS UnAmbitious

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My friend has told me one of his observation which I want to share with you,
"Being more ambitious is more dangerous than being not ambitious."
Its not that I completely agree with him, but I will remember this for rest of my life.
" read Ayre's blog.

I'd rather not be in a neutral zone and oppose that statement strongly... Being unambitious is the worst thing... Given an option of not doing something ... and failing after doing something.. i'd prefer the latter...coz i'll learn one way which doesnt work (Benjamin Franklin wud agree ;)).. but the problem is that the options are not as simple... u are not restricted to such two choices... coz if u r not doing that thing.. u may do something else where u may succeed.. what does one do in such situation.. answer is not at all simple .... but one thing which could become a solution is 'Quick Decision!'.. .. i am learning .. learning to take quick decision....