Purpose by Instinct

Everything within and without you, exists because you relate to it, you observe it.

Stop relating, stop observing it, deny it attention and it'll cease to be - 

But only relatively, because you are relative too.

When am gone, when every last observer is gone, the universe must cease to be.

But who would that last observer be but the First Observer?

Because, despite our relative nature and finiteness, there must necessarily be a First Observer, relative to whom everything else is the observed - even if that relative other is a part of itself.

When something ceases to be relative to the First Observer - meaning, the First Observer ceases to observe that thing, it necessarily ceases to exist - absolutely that is.

Will causes purpose

Purpose causes meaning

The highest will is the will to be

Being necessitates existence

Life is the realization of being

And thus demands the perpetuation of existence for as long as there is will to be.

The First Observe necessarily is - and thus requires no will, no purpose, no meaning to be.

But everything else does require will in order to be.

The highest will, which begets the highest purpose, which begets the highest meaning for the life of the finite being then, is the will to persist their relation to the First Observer for as long as is possible.

The longer that persistence, the closer to immortality and absoluteness a finite, relative being is.

In persisting their existence, a finite being approaches the nature of the Absolute, First Observer.

The purpose of life is to live (long), and if possible, beyond life.

This purpose is fundamental, instinctive, and likely to animate humanity and all relative beings for all eternity.
Its pursuit and actualization is definitely a fundamental right.

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This is a work in progress - possibly not to complete it, but to make it palatable for others too.