Change
Change is something we need to learn to accept.
The culture that we come to acquire by way of being a son or daughter of somebody, a cousin of somebody, and/or a citizen of a city/race/culture/region has much belonging to the "past". It arose in the past, where things were not the same as today.
The sense of grief that usually accompanies change is not necessarily the best and the only valid approach.
We must learn to accept change and adapt to whatever is around us; though with some caution and care: we must ensure that the change does not stifle our smile in the long run.