Ever observed thoughts? How many dimensions and disciplines it transcends? My own experience tells me that I go in and out of many subjects during the course of a day:
Maths
Physics
Business Strategy
History
Geography
English Language
Literature
Political Science
Psychology
Economics
Philosophy
Religion
All real world issues have a number of these dimensions. The mind scrapes the surface and moves ahead jumping from one aspect to another. What one gets a lot of time is an illusion of understanding. A belief that this is how it might be. How easy would it be to learn new things if it could go into a structure already existing in the mind. However, learning everything in life is not possible.
I think one the good thing is that a lot of the stuff is basic such as maths and language. Much of the other stuff builds on it. Its a progressive structure. The more solid your foundations are – the higher (wider) and faster (deeper) you can construct.