I am going to deliver a presentation to the students of the high school where I studied. Part of my presentations is to explain the differences among bachelor, master and PhD. A blog that I read several years ago, posted by Matthew Might,  come to my mind. I google it out and share with your guys. Here is the YouTube video, enjoy it. Anyway, keep pushing.

Matthew Might, a computer science professor at the University of Utah, writes:

Every fall, I explain to a fresh batch of Ph.D. students what a Ph.D. is. It’s hard to describe it in words. So, I use pictures.

Imagine a circle that contains all of human knowledge:

By the time you finish elementary school, you know a little:

By the time you finish high school, you know a bit more:

With a bachelor’s degree, you gain a specialty:

A master’s degree deepens that specialty:

Reading research papers takes you to the edge of human knowledge:

Once you’re at the boundary, you focus:

You push at the boundary for a few years:

Until one day, the boundary gives way:

And, that dent you’ve made is called a Ph.D.:

Of course, the world looks different to you now:

So, don’t forget the bigger picture:

Keep pushing.

References:
[1]Open Culture Blog: The Illustrated Guide to a Ph.D.

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