Under the thumb of his dark mistress there is always no groove of sight, the speaker struggles under her power. As much as possible, he can not break the bond between them. His threat was not threatening her, he knew this. His powers are lower than her power, and he knows this. By threatening his lover at the 140th sonnet, the speaker only admitted that he did not help him to be bound forever. This seems to be the first Sonnet in his position.
This experience cuts the deepest groove into me, so this groove is the most difficult to write - like dozens of grooves that look like bigger and deeper grooves. I am made up of family-based fundamentalist Christians. My parents' direct family went to church (with my two younger brothers and I) - we call it a meeting - two or three times a week. Our minister is highly appreciated. The Bible is the only religious book we have ever read. We are immersed in an exclusive version of Christianity; we spread to churches other than other sects and churches and are considered "secular". Our way is taught to be a direct descendant of the Bible's church system. From a very young age, this exclusive right did not resonate with me. For me, God who loves everyone will reject millions as people are not part of us.
One of the earliest devices was a sand table. It is a set of three grooves in the sand with up to 10 pebbles in each groove. Whenever a person wishes to add one counter, he adds a cobblestone to the groove on the right. When 10 pebbles are collected in the right groove, they are removed and pebbles are added to the groove on the left side. As limestone is used in the first sand table, the word "calculation" is said to come from Latin "calcis", limestone. Pebble containers should be in a form that is easy to calculate. With this, many of the excellent talents of the stone age will be busy for centuries. Approximately 5000 years ago, Tigris - Euphrates (and Egypt 460 BC) was thought that a clay board with many grooves was placed, and pebbles were placed in it.