i'll say, due to the impermenence of existence, suffering is
real for all sentient beings (first noble truth)!
Ordinally happiness when ended, suffering occur there after.
Know that suffering is real, and happiness is false. As suffering
don't become happiness, but happiness can become suffering.
Changing is real, while unchanging is false.
Example, when eating good food. Eating your favourite food is
happiness. But, if you were to continue to eat bowl after bowl of
the same food, it becomes suffering when you cannot eat anymore.
This is how happiness if continue become suffering. But suffering
if continue will not become happiness.
Example, when hungry, you experience suffering. If continue to stay
hungry for 7 days, you will experience more suffering, not
happiness. So suffering is real, and happiness is false.
But it's said that the state of Nirvana has no form of
sufferings.
In this samsara world there's duality. Suffering and happiness is
bias view for one side or the other. If Nirvana has no suffering,
then happiness is also gone. As both suffering and happiness are on
the same side of samsara. To Eradicate One of them, you need to
eradicate both of them. It's when both suffering and happiness are
ended/sever, that bring forth the state of Nirvana. Thus called
True bliss/happiness. If there's happiness, then happiness is
suffering and false. Nirvana is neither and indeed
inconcievable!
/\