Svalpam apy asya dharmasya trāyate mahato bhayāt (BG 2.40). Even little service you give, it is your permanent asset. Even if you fall down from that service platform, still, whatever you have done, it will never go in vain. As soon as there is opportunity, again you shall begin from that point where you left off.
Therefore everyone… Tyaktvā sva-dharmaṁ caraṇāmbujaṁ hareḥ (SB 1.5.17). There is a verse spoken by Nārada Muni, that even by sentiment, not understanding properly the philosophy of Kṛṣṇa consciousness, even by sentiment—'All right, let me also dance and chant like these people, the saffron-colored, shaved-head people are doing. Let me do that'—so once dancing with them will never go in vain. It will immediately be accounted, 'Ah, he has danced.' It is so nice. It will never go in vain."
(Srila Prabhupada Lecture, New York, July 15, 1976)