The thought of Masonic brotherhood likely descends from the 16th-century lawful definition of the "brother" as a person who's got taken an oath of mutual assist to another. Appropriately, Masons swear at each diploma to keep the contents of that diploma mystery, and also to assistance and protect their brethren https://f004.backblazeb2.com/file/DigitalAsset/westhillmasonry/Hardscape-Contractors.html