Which seems against the truth which I have shown thee,

Behoves thee still to sit awhile at table,
Because the solid food which thou hast taken
Requireth further aid for thy digestion.

Open thy mind to that which I reveal,
And fix it there within; for 'tis not knowledge,
The having heard without retaining it.

In the essence of this sacrifice two things
Convene together; and the one is that
Of which 'tis made, the other is the agreement.

This last for evermore is cancelled not
Unless complied with, and concerning this
With such precision has above been spoken.

Therefore it was enjoined upon the Hebrews
To offer still, though sometimes what was offered
Might be commuted, as thou ought'st to know.

The other, which is known to thee as matter,
May well indeed be such that one errs not
If it for other matter be exchanged.

But let none shift the burden on his shoulder
At his arbitrament, without the turning
Both of the white and of the yellow key;