From saṃyama on friendliness and the others, those powers arise.

Maitrī is friendliness, loving-kindness. Ādi means “and the others,” including the attitudes mentioned in sutra 1.33. Bala is strength, power.

Sutra 1.33 mentioned four attitudes: maitrī (friendliness toward the happy), karuṇā (compassion toward the suffering), muditā (joy toward the virtuous), upekṣā (equanimity toward the non-virtuous).

By applying saṃyama to these qualities, the yogī develops their corresponding powers.

What powers? The capacity to transmit peace through presence, to console without words, to inspire virtue in others, to maintain unshakeable equanimity.

These are powers of subtle influence. The yogī established in maitrī radiates friendliness; whoever approaches will feel comforted.

These siddhis are especially valuable because they benefit others. Unlike other powers that might inflate the ego, these dissolve it.

They are the powers of the heart, not of the will.