Writing the Traditions

I found the following traditions while reading

Write down [Tradition], for you will only remember it in this way

Through writing the heart finds confidence (al-qalb yattakil 'alä l-kitâba)

vocalize our words aloud, for we [the imams] are eloquent people (qawm
fusahâ')

al-Kulaynî, Usûl, vol. 1, pp. 66-67.