In this short life you have on planet Earth the karma you create while connecting with the many spirits who enter your life shape your destiny and transform you. For this reason and purpose, as our karmic time awaits our command. As your meditation on life channels through you the healing begins, if you so allow, and fitness for the soul engages.
No one can say whether or not the signs or messages you receive are a greeting from the other side although with the aid of channelers and mystics you can learn more about yourself and perhaps understand the message through a 'translator' as they interpret those signs not apparently clear to us.
We are all interconnected. Einstein proved "matter cannot be created nor destroyed.." Understanding that we actually all are pure energy and appear in human form, we will always exist in one form or another but always as energy without boundaries. When our human forms are no longer needed we still will be around in our energetic form, and thus stay interconnected to the world around us no matter what form we or others are in.