Mässigkeit und klarer Himmel sind Apollo 50 und die Musen—Moderation and a clear sky are Apollo and the Muses. Goethe.

Masters are mostly the greatest servants in the house. Pr.

Masters should be sometimes blind and sometimes deaf. Pr.

Masters two / Will not do. Pr.

Mastery passes often for egotism. Goethe.

Match-makers often burn their fingers. Pr. 55

Mater artium necessitas—Necessity is the mother of invention (lit. the arts).

Mater familias—The mother of a family.

Materia medica—Substances used in medicine; therapeutics.

Materia prima—The primary substance or substrate.