Now it is, and now it is not

From 'Swa leaf on treowum' by Clerk of Oxford.

A fourteenth century poem in today's English. Very topical for the season.

Winter awakens all my sorrow,
Now the leaves grow bare.
Often I sigh and mourn sorely
When it comes into my thoughts
Of this world's joy, how it all goes to nothing.

Now it is, and now it is not,
As if it had never been, truly.
What many people say, it is the truth:
All passes but God's will.
We all shall die, though it please us ill.

All the grass which grows up green,
Now it fades all together.
Jesu, help this to be understood,
And shield us from hell!
For I do not know where I shall go, nor how long I shall dwell here.