Today someone from your past will come back into your life and make you realise what you have today.
Your past will inform your present in a positive way today. You may make contact with old school friends, bump into an old flame, or re-connect with lost friends or family members. Whichever it is, this will make you feel nostalgic, but it will also make you realise how much you have changed and how far you have come in your life. As long as you do not dwell on the past, this is a positive thing.