Why can't you call a non-static method from a static method?

Question

I have a static method [Method1] in my class, which calls another method [Method2] in the same class and is not a static method. But this is a no-no. I get this error:

Answer 1

Simple rule of thumb is:

A static method/class/ctor can never ever [use/call/invoke/what the heck you name the verb] call a non-static field, property, or method. But, calling by means of instantiation.