The following meditation is from The New Meditation Handbook, by Geshe Kelsang Gyatso
8. RECOGNIZING THAT ALL LIVING BEINGS ARE OUR MOTHERS
Purpose: To enhance our affectionate love for all living beings
Since it is impossible to find a beginning to my mental continuum, it follows that I have taken countless rebirths in the past. And if I have had countless rebirths, I must have had countless mothers. Where are these mothers now? They are all the living beings alive today.
Object of meditation: The recognition that all living beings are our mothers.
I find this statement to hold heavy weight. Not only are we mothers in past lives but we are mothers of our own actions, thoughts, and current life. Every moment we live is an opportunity to birth a moment of beauty. We make a conscious choice to create something wonderful or kill our unborn happiness when we live in a state of unconsciousness or are un-intentional with our own actions.