Many argue that one should be satisfied with his current state and never think of any other possibly better situation. Others ,however, believe one should always try to find better solutions and keep improving until he reaches his goals. I believe both of these opinions are partially true, but I value the former more. To become an expert in solving a problem, you need to spend a lot of time dealing with that problem and so, putting enough time is necessary for a profession, one should try to progress at any time. Otherwise, humankind would never be able to progress so much.