How long can you spend on a single thought? Ever try meditating?  It's not easy!  Especially when you don't do it often.  What happens when you meditate every day for a month? Do you think you get better or worse at the act of focusing on one thought?  What about thinking about a specific thought - like that of your passions, or an objective?  Do you think you could get better at thinking if you gave it time everyday? Just a little time!