Thank you for your question.
You see, life on this planet is constantly changing.
We are born, we grow up and we are brought up with old values, why?
Because there is nothing better, in the sense that it is the best we have been able to do so far.
But it's not over there, we have not arrived and never will be.
Does that mean that all past knowledge is to be rejected?
Absolutely not, they must be learnt and internalised, only then will one be able to go further.
Would you be able to solve a differential equation without knowing how to do a sum or division?
Plato's ideas are also past, and carry with them an innocent guilt, so classicism etc .... can be seen well with the parallel of science, did we stop at Descartes? at Newton? No, we keep moving forward, here, we must also do the same with our thinking.
At the moment I am writing this, life is already not the same as it was yesterday, but we remain anchored to past ways of seeing, which reassure us, change is scary, life changes so fast, while our mind is much slower to change.
And it is useless to fight, life continuously overwhelms us, the more we fight against change the more we hurt ourselves.
There is no certainty, let's stop it, we know it now, let's try to carry the great teachings of the past into the future for the benefit of the new generations, to lose them would be a disaster, because it would set us back, but once we have learnt these we have to put our own spin on them in order to be able to interpret the reality we live today in the best possible way, which is different from yesterday, ten years ago or two thousand years ago.
In fact, I could go even deeper, it doesn't even exist yesterday, except in our memory, and not even tomorrow, except as something closely related to what we do today, now, in ten seconds it is already not now.
This below should explain it in more detail.
From
XENOPHANES to
THE DEATH OF THE GODS