Time is a great teacher, unfortunately it kills all its pupils.

The passage of time teaches us valuable lessons about life and the world around us. It helps us grow and learn from our experiences, shaping us into better individuals with each passing day. However, this same teacher has an unforgiving nature - once the lesson is learned, it cannot be undone or recalled.

As we navigate through life's journey, time molds and shapes our perspectives on various aspects of existence. We encounter numerous challenges that test our resolve and resilience, forcing us to adapt and evolve in order to survive. In this sense, time serves as both a mentor and a judge.

One of the most significant lessons that time imparts is patience - an essential quality for achieving success in any endeavor. Time waits for no one; neither does it spare anyone from its relentless march forward. Thus, learning to appreciate its value while cultivating patience becomes crucial for personal growth.

Another profound lesson taught by time relates to impermanence - nothing lasts forever in this fleeting world we inhabit. Every moment lived brings change with it; some changes are welcome while others are not so easily accepted or embraced readily by human hearts yearning stability and permanence within their lives.

5.Finally yet importantly, the aphorism reminds us that despite how much knowledge we acquire or accomplishments we achieve during our lifetimes – whether they be intellectual achievements or material possessions – ultimately none will last beyond death's door when time claims them as her own pupils who have learned too late what she had intended them to know all along: "that nothing matters but everything matters" (T.S.Eliot).