What meaneth the tree which he saw?

1 Nephi 15:22
22 And I said unto them: It was a representation of the tree of
life.

1 Nephi 15:23
23 And they said unto me: What meaneth the rod of iron which our
father saw, that led to the tree?

1 Nephi 15:24
24 And I said unto them that it was the word of God, and whose
would hearken unto the word of God, and would hold fast unto it,
they would never perish; neither could the temptations and the
fiery darts of the adversary overpower them unto blindness, to
lead them away to destruction.

1 Nephi 15:25
25 Wherefore, I, Nephi, did exhort them to give heed unto the
word of the Lord; yea, I did exhort them with all the energies of
my soul, and with all the faculty which I possessed, that they
would give heed to the word of God and remember to keep his
commandments always in all things.

1 Nephi 15:26
26 And they said unto me: What meaneth the river of water which
our father saw?

1 Nephi 15:27
27 And I said unto them that the water which my father saw was