The 5 Abilities producing Feeling!
The Blessed Buddha once said:
Bhikkhus, there are these five mental abilities to feel (vedanā). What five?

1: The ability to feel pleasure (sukha).
2: The ability to feel pain (dukkha).
3: The ability to feel gladness (somanassa).
4: The ability to feel sadness (domanassa).
5: The ability to feel equanimity (upekkhā).

Feelings are like bubbles, empty, void, without substance, quickly bursting!

What, Bhikkhus, is the ability to feel pleasure?
Whatever bodily pleasure there is, whatever bodily comfort, any pleasant
agreeable feeling born of body-contact: This is the ability to feel pleasure.
What, Bhikkhus, is the ability to feel pain?
Whatever bodily pain there is, whatever bodily discomfort, painful, aching
disagreeable feeling born of body-contact: This is the ability to feel pain.
What, Bhikkhus, is the ability to feel gladness?
Whatever mental pleasure there is, whatever mental comfort, and pleasing
agreeable feeling born of mental contact: This is the ability to feel gladness.
What, Bhikkhus, is the ability to feel sadness?
Whatever mental frustration there is, whatever mental grief, disagreeable
feeling born of mental contact: This is the ability to feel sadness.
What, Bhikkhus, is the ability to feel equanimity?
Whatever feeling there is, whether bodily or mental, that is neutral & thus
neither comfortable, nor uncomfortable, neither agreeable nor disagreeable:
This, Bhikkhus, is called the ability to feel equanimity. These five, Bhikkhus,
are the five abilities to feel feelings.