What is important is rarely urgent and what is urgent is rarely important.

We often complain because we don’t have the time to live, and instead we have that time and it is even more than we need. Only that we treat this resource, the most important one at our disposal, as if we had an infinite quantity, while instead it is over and we do not know the quantity that is given to us.

Life is divided into three times: past, present and future. The present is short, the uncertain future, the secure past. Everyone consumes their life and is tormented by the desire for the future and the boredom of the present, underlines Seneca.
But the truly scarce and therefore the best resource to manage is time.