Thinking Big vs Not thinking at all

I have wondered how the exposure to higher and better world leaves one with a sense of expanse..... I still know of people (my acquintance form school and college) who think of a 9-to-5 secured job as be-all and end all. Most content to a be a primary school teacher or a panchayat cleric they are. And I have few of my friends thinking of floating companies, employing big reosurces, generating employment and being what I call an alter ego of people of first group. Surprisingly, similar kind of education and environment gave birth to both types. Probably the seed was same, the manure seems to be making difference.