What is in a day?
First and foremost a day is a measurement of time. As such it is a collection of moments, pieced together on a continuum and strung together through experience. The experiences we are able to encapsulate into a unit of measurement defined as 24 hours is labelled as a day.
What is in a lifetime?
A lifetime is quantified by a collection of experiences we encounter. Each is unique and provides something of value for us in that moment of time, these experiences of the environment as a collective unit is defined as a lifetime.
As such, the collective of actions taken becomes our life. And so, how we act in a day, is how we act for our life.