One pole is experienced from the other pole

Only a hellish human (internal condition) can experience heaven.
Only a heavenly human can experience hell.
Like how only a very hungry person enjoys food.
Your experience is the relationship between the polarities.
-ve -> +ve = heavenly experience.
+ve -> -ve = hellish experience.

Dualities/Polarities:
Pleasure pain
Ecstasy agony
Heaven hell
Security insecurity
Positive negative
Light darkness
Gratification torture
Power powerlessness
Strength weakness
Happiness grief
Gain loss
Healing injury
Attraction repulsion
Love hate
Joy suffering
Harmony chaos
Vitality depression
Comfort hardship
Exhuberance dullness
Ease disease
Rest unrest

Enjoy and ride each of these cycles.