Bhagavad Gita · Sankhya YogaChapter 2, Shloka 70 (2.70)

The ocean comparison. In the rains thousands of rivers swell and pour into the ocean — the ocean does not overflow. In summer the rivers dry up — the ocean does not dry up. It is āpūryamāṇa — always full — and acala-pratiṣṭha — immovable within its bounds.

Shankaracharya: the waters enter the ocean svātma-stham avikriyam eva santam — leaving it unchanged; in the same way, even when sense objects are near, desires enter the person avikurvantaḥ — without causing any change; ātmany eva pralīyante, na svātma-vaśaṃ kurvanti — they dissolve in the self and do not bring him under their control — he attains śāntiṃ mokṣam — peace, that is, moksha.

Ramanuja — whether they come or not. Ramanujacharya: whether the waters of the rivers enter the ocean or do not enter it, it makes no particular difference to the ocean. In the same way, whether objects such as sound come before the senses or not — the one who is not disturbed, svātmāvalokana-tṛptyā — because of the contentment of seeing his own self — he alone attains peace.

Madhusudana: sense objects come prārabdha-karma-vaśāt — because of prarabdha karma (past action already set in motion) — avarjanīyatayā — unavoidably, but they cannot disturb his mind.