Frank J. Wilstach, comp. A Dictionary of Similes. 1916.
Alter
Altering, like one who waits for an ague fit.
—John Dryden
Alteration of Religion is dangerous, because we know not where it will stay: ’tis like a Millstone that lies upon the top of a pair of Stairs; ’tis hard to remove it, but if once it be thrust off the first stair, it never stays till it comes to the bottom.
—John Selden