Your late husband lost his life for the sake of the Lotus Sūtra. His domain, which barely supported his life, was confiscated for the sake of the Lotus Sūtra. Isn’t this equivalent to him sacrificing his life?

The Young Ascetic in the Himalayas sacrificed his own body in order to learn the second half of a verse, and Medicine King Bodhisattva in his previous life burned his own body as an offering to the Buddha for 1,200 years. These are the stories of sages, whose lives continued just as when water is thrown on fire, the firewood is not consumed. However, your late husband was an ordinary man, whose life disappeared just as a piece of paper is consumed by the fire.

Considering all things, I think due to this great merit of your late husband he is now reborn either in the great moon or sun and every moment is watching you, his children and their mother, through the heavenly mirror. Because you and your children are ordinary mortals, you are unable to see and hear him, just like the deaf cannot hear a thunderbolt or the blind cannot see the sun. Have no doubt, though, that your late husband is your protective deity. Moreover, he is probably very close to you all.

Myōichi-ama Gozen Goshōsoku, A Letter to My Lady, the Nun Myōichi, Writings of Nichiren Shōnin, Volume 7, Followers II, Pages 135