Great questions with no answers

It seems that most of the questions that we ask ourselves in life have no answers.What answers we get are fairly unsatisfactory, the qualification "fairly" for the fact that we have to be satisfied with what we know.Why is it that we have no answers to such questions stems from the fact that the so called "great questions" are not questions of any firmness at all. For example if someone asks you "What are you studying?" you could furnish him with a clear, logical and unambiguous answer. However a question like "What is your ambition?" can give you vague answers and even if the answers seem clear, the clarity is usually illusory.