How you can use this for language learning?

Get a set of flashcards for memorizing vocabulary or grammar.
Master the hard pinch (it should be quite hard) to activate your body’s threat response.
Review a category of flash cards (such as adjectives or group of words). Don’t pinch yourself at this stage.
Review the same category, now adding the pinch for each vocabulary word. Spend some time studying the card before moving to the next one.

Softening your perspective towards yourself and others; allowing yourself to experience tenderness and nurturing instead may seem counterproductive, but in the long run, may reap more abundant rewards.

Tough is just bravado. Softening up is a new normal you should try.

You may feel sadness more intensely, or anger. Disappointment, fear, grief. The flip side is you may discover joy like you’ve never allowed yourself to feel before. You may laugh harder, feel more inspired, encounter wonder and awe at things you previously took for granted.