from the sublime to the ridiculous
From the beautiful to the silly, from great to puny. For example, They played first Bach and then an ad jingle—from the sublime to the ridiculous. The reverse, from the ridiculous to the sublime, is used with the opposite meaning. Coined by Tom Paine in The Age of Reason (1794), in which he said the two are so closely related that it is but one step from one to the other, the phrase has been often repeated in either order.