I am greatly concerned about the illness of your lord. Even though your lord does not seem to place his full trust in you, you are fortunate enough to be his retainer and to receive his favor, which in turn enables you to believe in and support the Lotus Sūtra. This will certainly be considered a prayer for the recovery of your lord from illness. Although a bush under a large tree does not receive the rain directly, and the grass growing near a large river does not have immediate access to the river water, the bushes receive dew from the large tree, and the grass absorbs moisture from the great river to survive and grow. The same can be said of the relationship between you and your lord.

Sushun Tennō Gosho, The ‘Emperor Sushun’ Letter, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 119-120