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.
The world is the totality of facts, not of things.
The world is determined by the facts, and by these being all the facts.
For the totality of facts determines both what is the case, and also all that is not the case.
What we cannot think, that we cannot think: we cannot therefore say what we cannot think.
In fact what solipsism means is quite correct, only it cannot be said, but it shows itself.
That the world is my world, shows itself in the fact that the limits of that language (the language which I understand) mean the limits of my world.
I am my world. (The microcosm.)
The thinking, presenting subject; there is no such thing.
Hence also there can be no ethical propositions.
Propositions cannot express anything higher.
It is clear that ethics cannot be expressed.
Ethics is transcendental.
(Ethics and aesthetics are one.)
My propositions are elucidatory in this way: he who understands me finally recognizes them as senseless, when he has climbed out through them, on them, over them. (He must, so to speak, throw away the ladder, after he has climbed up on it.)
He must surmount these propositions; then he sees the world rightly.
Whereof one cannot speak, thereof one must be silent.