THEORETICAL PHYSICS

Theoretical physicists invent and study theories. These theories are written in a mathematical language and use mathematical tools. 

For instance...

A theory to explain gravity is created.

Once that theory is created, they use math to explain why that happens.

So, when a apple falls from the apple tree, it hits the ground instead of floating around.

Why does it hit the ground?

There is some unseen force that pulls it down.

How is this unseen force created?

What created this unseen force?

Is this unseen force responsible for human being walking on the ground instead of floating around?

What mathematical models or formulae can I develop to help prove what I have theorized?

Einstein's theory of gravity was explained by using a blanket.  Four people are standing at each corner of the blanket pulling it as tight as possible but the strength they exert at each corner is equal.  When a ball is placed anywhere on the blanket, it does not move.

However, if the blanket is loosened at each corner equally, and a ball is placed anywhere on the blanket, it will roll to the center of the blanket every time.

This is an example of gravity and happens because the fabric of space (the blanket) is curved.

This curved fabric of space is responsible for the apple falling the ground when it drops from the tree.

Personally, I can understand the logic of the blanket but have no idea of the math needed to prove or explain the theory.

For Einstein, creative thinking and logic came first before the math.  And, while the math is important, the thinking and logic is critical.  If you know the math but do not have creative thinking or logical thinking, then your math from a theoretical standpoint is meaningless.

From my standpoint, the key here is the thinking...  not many people know how to creatively think even those who are mathematicians.  It is relatively easy to find a mathematicians, but not so for a THINKER.