This quote is so relevant to life right now - stop waiting and start living because now is the time to be enjoying life instead of putting it off to some indefinite time in the future. How often do we wait for that 'magical' event that will make everything alright? How many times do we say "if only" and add a qualifier to when and how we'll be happy?
Let's just live in the moment - suck the happiness out of every second that we can and be grateful for the multitude of blessings that come our way every day. Let's sing a little, dance if we feel like it and generally get on with enjoying life right now while we can - who knows what tomorrow holds? Seize the "now" and celebrate life!