All you have is right here, right now - worrying about anything else robs today of its pleasure. Everyone has a past, everyone has a future - 'tis true - and how we choose to live today determines both.
The here and now is what we really have - and we can choose to look back to the past, look forward to the future, or look moment by moment to the day at hand. Life is built moment by moment by the choices we make here and now.
What choices are you making as you live today?