Give a thorough explanation of this quote "dream it, think it, work it, achieve it! "

So you have a dream then you need to think out like make a plan, then you just have to work towards it and believe in yourself and then you can achieve it.

In order to achieve something, you must first have some idea of what it is that you wish to achieve.
that idea is the dream. after you're done dreaming, you must think about how to accomplish that dream. you plan and consider all of your options, the possibilities, the costs, the risks, and the outcomes. then you must work to put that plan in action to achieve what you want to achieve.