For ages, people have had great faith in odd numbers. They have often been used as charms and for medicine. Some one says: "Some philosophers are of opinion that all things are composed of number, prefer the odd before the other, and attribute to it a great efficacy and perfection, especially in matters of physic: wherefore it is that many doctors prescribed always an odd pill, an odd draught, or drop to be taken by their patients. For the perfection thereof they allege these following numbers: as 7 Planets, 7 wonders of the World, 9 Muses, 3 Graces, God is 3 in 1, &c." Ravenscroft, in his comedy of "Mammamouchi or the Citizen Turned Gentleman," makes Trickmore as a physician say: "Let the number of his bleedings and purgations be odd, _numero Deus impare gaudet_" [God delights in an odd number]. Nine is the number consecrated by Buddhism; three is sacred among Brahminical and Christian people. Pythagoras held that the unit or monad is the principle and end of all. One is a good principle. Two, or the dyad, is the origin of contrasts and separation, and is an evil principle. Three, or the triad, is the image of the attributes of God. Four, or the tetrad, is the most perfect of numbers and the root of all things. It is holy by nature. Five, or the pentad, is everything; it stops the power of poisons, and is dreaded by evil spirits. Six is a fortunate number. Seven is powerful for good or evil, and is a sacred number. Eight is the first cube, so is man four-square or perfect. Nine, as the multiple of three, is sacred. Ten, or the decade, is the measure of all it contains, all the numerical relations and harmonies.[122] Cornelius Agrippa wrote on the power of numbers, which he declares is asserted by nature herself; thus the herb called cinquefoil, or five-leafed grass, resists poison, and bans devils by virtue of the number five; one leaf of it taken in wine twice a day cures the quotidian, three the tertian, four the quartan fever.[123]