My teacher always used to say that changes are inevitible. But people are resistant to changes. This is quite as change can be daunting, and people may be hesitant to step outside their comfort zones, even if they believe the change would be beneficial. Nowadays, I have seen a lot peoole going to religious places and listen to various preaching. It is act of delivering a sermon, which is a speech intended to provide religious instruction or encouragement for a better life. Still there are individuals who are not changing. In this Reference, Sanskrit have following to say :
स्वभावो नोपदेशेन शक्यते कर्तुमन्यथा |
सुतप्तमपि पानीयं पुनर्गच्छति शीतताम् ||
Svabhaavo nopadeshena shakyate kartumanyathaa.
Sutaptamapi paaneeyam punargacchati sheetataam
Svabhaavo = inherent nature.
Nopadeshena = na + upadeshena.
Na = not.
Upadeshena = preaching, advising.
Shakyate = can be.
Kartumanyatthaa = kartum + anyathaa.
Kartum = to do.
Anyathaa = otherwise.
Sutaptamapi = sutaptam + api.
Sutaptam = much heated.
Api = even.
Paaaneeyam = a drink.
Punargacchati = punah + gacchati
Punah = again
Gacchati = goes, becomes.
Sheetataam = coolness.
i.e. Just as very hot water or a hot drink (tea or coffee) again achieves its normal cool temperature after some time, similarly the inherent nature of people can not be changed otherwise by preaching.
The phenomenon of heated water again becoming cool after some time has been skillfully used as a simile in this Sanskrit quotes, to bring forth the point that the inherent nature of people can not be changed by preaching.
It's possible for someone to be influenced by a sermon to act in a certain way (e.g., be more generous or charitable), but that doesn't mean their inherent nature has changed. They might be acting out of a sense of obligation or guilt rather than a genuine shift in their character. True, lasting change often requires more than just hearing a sermon. It involves self-reflection, conscious effort to alter behaviors, and potentially even professional help to address deep-seated issues.