The poem
The little lives of earth and form, Of finding food, and keeping warm, Are not like ours, and yet A kinship lingers nonetheless: We hanker for the homeliness Of den, and hole, and set.
And this identity we feel - Perhaps not right, perhaps not real - Will link us constantly; I see the rock, the clay, the chalk, The flattened grass, the swaying stalk, And it is you I see.

Reminds me of William Blake's poem, "The Fly". We are part of a greater circle. This is a great poem to read with Larkin's "The Mower". To me, it's an extension that we are one and the same, and because of this, the next logical step is to value one another, not waste energy with remorse or hate.
Nowadays people get two wrapped up in material objects, I understand Larkin's message to be to take a step back and realise we are no different from any other living creature, perhaps then we will learn to respect our earth, and protect it for the future.