When the spirits are low

When you get up in the morning, and your spirits are low,
When you find work boring, and the clocks are slow,
When outside you, everything is a mess,
And inside you, you feel restless,
Summon your energy and force yourself to sit,
Focus on your work and do it bit by bit,
For even the greats, like you, have had off days,
But they carried on with their work anyways.