Regret/Philosophies

At the end of the drama "Shining Inheritance/Brilliant Legacy" [A Korean Drama] SungMee says a really astronomically good line! Her quote is perfect! 

I should really say the quote and its: "Regret? Regret is for those who had a choice." OMG!!!!! It's so wise, and yet so sad......... "Regret is for those who had a choice." WOW! It's so deep..............

I personally find that quote true, because you regret your actions when you had a better one to choose from. You really cannot regret something you did if you had no other choice, because what's there to regret then? 

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Part Two:

Philosophies........................

I am a person who likes definite things, I do not like anything which is debatable. Two plus two is always four, there is no other answer, ever! Yet some things are un-answerable, such as the question which I previously wrote "What is love?" Although you may answer that question, there isn't a definite answer provided by factual evidence, where everyone will agree.......

Ever since my English teacher Ms. Hoque (pronounced hawk, like the bird hawk) brought up the topic of philosophies it made me think about it............ Here are several philosophical questions that I have:

1) How to live life to the fullest and without regret?

2) What is love?

3) What is a person's destiny?

4) What is family?

and lastly

5) Why were we born?

I hate those questions because there aren't any scientific answers for those questions? For example, although blood relations is essentially what a family is, deeply it is not...... It's suppose to be a group of people tied to together through love and hardship............ Yet other people will disagree and say something else........................ See? This is why philosophical questions are annoying.............. If there is a definite answer than it's not a philosophical question right?

One answer for question one, is developed throughout history. For example, Buddhism is a way of life so it is classified as a philosophy, yet today it is a religion because there are eternal "forces" and other "factors"......... :D Also I think vegetarianism is a philosophy because it too is a way of life.......... :D

Whatever, from this point on I hate when people ask philosophical questions.......... :D