TIME
It’s not playing with you, it’s not waiting for you, and it doesn’t play favorites. It just keeps on going whether you are standing still or moving with it. You’d do best to leverage the time that you have - the time that you know you have - which is simply today. Right now.
It is a vapor, and as such, there should be a fierce protection over the ways you spend and invest your time. It is a currency that you can only spend once. Spend it wisely. It is an arrogant assumption that you have time to say, do, and experience things…later. You have now. Embrace, employ, and enjoy the time you have - today.