I dont understand the poem "Grandfather" by Jayanta Mahapatra. Can somebody explain the summary of this poem?

This poem is about an old man who suffered through a
famine The old man is the speaker’s grandfather. The speaker starts out reading the
grandfather’s diary, for he says:

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The yellowed diary’s notes whisper in
vernacular

This means that he
is reading the grandfather’s diary, written in his native language (vernacular). By
reading the diary, the speaker can experience what his grandfather went through during
the famine because it is described in the diary, which is so old it has “yellowed”
pages. If you read through the rest of the poem, you will see some of the things the
grandfather suffered – starvation, weakness, despair. The grandfather had to leave his
family behind, probably burying many of them. The speaker states that no doubt, faith
was unimportant to a man that was starving.

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What did faith matter? What Hindu world so
ancient and true for you to
hold?

The speaker asks the
grandfather many rhetorical questions: Did you see your own death? How old were
you?

The poem ends with the speaker bemoaning the fact that
he didn’t know his grandfather enough. He is looking at his grandfather’s picture – “you
are an invisible piece on a board”.