The future can be a sad promise.

You could be promised heartbreak. 

You could be promised nothing.

You can be promised anything.

That might not be enough.

The river can be a sad promise.

It's current flows downstream.

The future can be a sad promise.

You could be promised sadness.

You could be promised loneliness.

You could be promised anything.

That might not be enough.

The river can be a sad promise.

Its flow promises a blank current.

The future can be a happy promise.

You could be promised love.

You could be promised everything.

You can be promised anything.

That could be enough.

The river can be a happy promise.

It's current flows upstream.

The future can be a happy promise.

You could be promised happiness.

You could be promised everyone.

You could be promised anything.

That could be enough.

The river can be a happy promise.

It's current flows calmly.

The river keeps flowing.

No matter what happens, it keeps flowing.

The river holds no promises.

The promise can be happy. 

The promise could be sad.

 We are uncertain about how it will end.

It can promise anything or nothing.

It can be enough or too little.

We don’t know how the river will end.