It is not our part to master all the tides of the world,
but to do what is in us for the succor of those years wherein we are set,
uprooting the evil in the fields we know,
so that those who live after us may have clean earth to till.
What weather they shall have is not ours to rule.
~J.R.R. Tolkien — Gandalf in The Return of the King
There is no end to what a field will throw up to thwart the harvest:
stones that rise from the soil,
fences that topple,
thistles and brambles that take over once they gain a foothold,
varmints that undermine.
We do what we can to keep it clean for those who come next,
not knowing what will be,
preparing for the worst, and praying for the best.