after realisation how to not be affected by external circumstances

Answer in Details

In the teachings and philosophy associated with Lord Shiva, particularly within the context of Advaita (non-dualism) and Shaiva traditions, the state after realization (Self-realization or Atma-jnana) is one where a person recognizes their true nature as not separate from the Supreme Consciousness—Shiva Himself.

To not be affected by external circumstances after realization, consider these insights from Lord Shiva’s teachings:

1. Abide in Inner Stillness (Shiva Tattva):
After realization, one understands that the true Self is unchanging, eternal, and beyond all external phenomena. Lord Shiva is often depicted in deep meditation, unaffected by the world. You, too, can cultivate this state by abiding in the awareness of your inner Self.

2. Practice Vairagya (Detachment):
Shiva teaches detachment—not indifference, but inner freedom from the push and pull of external events. Recognize that pleasure and pain, gain and loss, are transient. Witness them without getting entangled.

3. Surrender to Shiva (Ishvara Pranidhana):
Surrendering the fruits of actions and outcomes to Lord Shiva helps maintain equanimity. Trust that everything happens by divine will.

4. Regular Meditation (Dhyana & Japa):
Continue your sadhana (spiritual practice), such as meditation on Shiva or chanting “Om Namah Shivaya.” These practices anchor you in the Self and shield you from external disturbances.

5. See Shiva in All (Shivoham):
After realization, see the presence of Shiva in every being and circumstance. This vision dissolves the sense of separation and lessens the impact of external events.

As Lord Shiva teaches in the Shiva Sutras:
“Jnanam bandhah”—Limited knowledge is bondage.
But after realization, the sage is liberated and unaffected by the world, abiding in the bliss of the Self.

In summary:
Anchor yourself in the awareness of Shiva within. Witness all external circumstances as passing phenomena, while your true Self—Shiva—remains unchanging and untouched. This is the essence of remaining unaffected, as exemplified by Lord Shiva Himself.