Of a Spark of Fire

A spark of fire is¹ like a mouse,² doth eat
Into a cheese, although both hard and great.
Just so a spark, although it³ be but small,
If once those points can fasten, pierce⁴ through all.

1. is] ’tis 1664, 1668
2. A marginal note in Cavendish’s 1653 text reads: “The sharp atoms are like the teeth of mice.”
3. Just so a spark, although it] For Sparks of Fire, although they 1664, 1668
4. If once those points can fasten,] Yet where those Points take hold, they 1664, 1668