One of my mum's favourite sayings to us growing up was "Time and Tide wait for no man".
This brilliant video, an illustration of an Alan Watts monologue entitled "The Illusion of Money, Time and Ego" brought this saying back to mind.
"Time and tide..." one a mental construct, the other a physical phenomenon of nature.
And neither of them wait for you.
They both keep marching on, and the only thing that distinguishes this point in a timeline, from one in the future, is what happens in it i.e. what you do.
So, maybe "get busy living".