True, it should seem that the tissue of thought
Is like a web by cunning master wrought,
Where one stroke moves a thousand threads,
The shuttle shoots backwards and forwards between,
The slender threads flow together unseen,
And one with the others thousand-fold weds:
Then steps the philosopher forth to show
How of necessity it must be so:
If the first be so, the second is so,
And therefore the third and the fourth is so;