The human body had natural limits ingrained by instinct—a threshold that prevented it from exerting strength beyond what it could endure. However, there were moments when these limits were breached: when one must protect someone more precious than life itself, or when one's own life was on the line.0

In such instances, all the body’s capabilities—muscle strength, reflexes, dynamic vision, and sensory perception—could increase by at least fivefold. Yet, this extreme power was temporary, causing severe fatigue and damage to the muscles. Moreover, such force could not be wielded at will during these life-threatening moments.0

Heavenly Strength made this possible. Of course, it could not be used indefinitely. On average, it could only be sustained for about ten minutes a day. It was technically possible to extend this duration, but the body wouldn’t be able to withstand it. This made the recommended limit precisely ten minutes.0

“Instructor, what exactly is Heavenly Strength?”0

“They say humans exhibit their greatest strength only at the brink of death. Heavenly Strength allows you to do that anytime you want.”0

Despite hearing Keter’s explanation, the four trainees were dumbfounded, not because they didn’t understand but because it was too easy to understand.0

“Uh, Instructor… are you saying you’re going to push us to the brink of death to teach this?”0

“You feel like you’re going to die now, don’t you? But no. You still have energy left. You’re exhausted, but...0