The sun rises
The sun sets
The same 24 hours every day; but somehow time appears to speed up as the years rush by.
I am (we are) surrounded by that which is transient, with no intrinsic value. What significance is there apart from what I can impart to others.
For there to be longevity of vision or betterment of humanity there needs to be a giving of oneself to the people who come after ourselves. A short-sighted and me-only approach may feel nice for the individual but will ultimately lead to nothing.
Significance comes not in what you gain but by what you give.