Realization means you should write.
Every one of you, what is your realization. What for this Back to Godhead is? You write your realization, what you have realized about Kṛṣṇa. That is required. It is not passive. Always you should be active. Whenever you find time, you write. Never mind, two lines, four lines, but you write your realization. Śravaṇaṁ kīrtanam, writing or offering prayers, glories. This is one of the function of the Vaiṣṇava. You are hearing, but you have to write also.
Then write means smaraṇam, remembering what you have heard from your spiritual master, from the scripture. Śravaṇaṁ kīrtanaṁ viṣṇoḥ: [SB 7.5.23] about Viṣṇu, not for others. Don’t write any nonsense thing for any nonsense man. Useless waste of time. Viṣṇu. Write about Viṣṇu, Kṛṣṇa. This is cultivation of Kṛṣṇa consciousness. Hear, write, remember, try to understand. Don’t be dull, dull-headed. Very intelligent.
(Sri Brahma-samhita, Verse 32 Excerpt — Los Angeles, August 14, 1972)