Identity

There are either absolutes or there are not absolutes.  If I assert that there are no absolutes, my assertion is itself an absolute; therefore, there are absolutes.

One such absolute is that everything that is, is.  Everything is itself.  Desiring, wishing, willing, or positive thinking alone will not change something from one thing to another.

This is sometimes phrased as "A is A."  In math we use the word "equals."  Everything is the same as itself.  A word always rhymes with itself.  A number is always equivalent to itself.

This principle is known as the Law of Identity and is the most fundamental law of thought.