There are many answers to this question as it depends on what aspect of the State you are looking at.
It also depends on how deep someone has gone into the State; for some it is subtle due to their concentration levels and for others it is profound and completely life changing.
You can’t judge someone who has the State if they don’t wish to talk about it to anyone if, for them it didn’t actually mean much. Some people would philosophize about the State and reduce it to a single point, therefore taking away the Joy, Wonder and Love.
There is no requirement because that would take people’s free will away; there is no requirement to do anything. But, if a person attains the State, truly melts into the Energies it changes them. They are not the same person and they feel totally that they need somehow to reach out to others.
If those people do not teach or somehow give this Knowledge to others there is a deep sadness in them that never goes away. They know the Truth and they are not sharing it.