A sample meditation

I found this prepared on my computer today. Could you help me explain what it means?

meditation

You see the elements of your memory tumbling down in front of you, in a great column of swirling hot air. You can recognize people, scenes, ideas that have been important to you.See them all fall down. Seperate yourself from them all.
You are tumbling with them because you must be. No grip.
You see them moving upwards again: the smiling, loving faces, memories, ideas, all you ever lived for.Upwards or downwards movement makes no difference.