Purpose of philosophy

What is ultimately the purpose of philosophy? It is to uncover truth.

What is truth? Truth is that which exists.

What is un-truth? Un-truth or the false is that which does not exist.

How does one realize what is true and what is false?
Truth exists without change. Truth is that which is beyond doubt.
False keeps changing and is never absolutely certain. It is subject to doubt.

False has many faces. Truth is One.

That which is true is true even now. That which is false is not.

Leave aside the false and recognize the truth. This is the only task of philosophy.