It is impossible to describe these things in Writing, and every Brother must attend in his Place, and learn them in a Way peculiar to this Fraternity: Only Candidates may know that no Master should take an Apprentice unless he has Sufficient Employment for him, and unless he be a perfect Youth having no Maim or Defects in his Body that may render him uncapable of learning the Art of serving his Master's Lord, and of being made a Brother, and then a Fellow-Craft in due Time, even after he has served such a Term of Years as the Custom of the Country directs; and that he should be descended of honest Parents; that so, when otherwise qualifi'd he may arrive to the Honour of being the Warden, and then the Master of the Lodge, the Grand Warden, and at length the Grand Master of all the Lodges, according to his Merit.
No Brother can be a Warden until he has pass'd the part of a Fellow-Craft; nor a Master until he has acted as a Warden, nor Grand Warden until he has been Master of a Lodge, nor Grand Master unless he has been a Fellow Craft before his Election, who is also to be nobly born, or a Gentleman of the best Fashion, or some eminent Scholar, or some curious Architect, or other Artist, descended of honest Parents, and who is of similar great Merit in the Opinion of the Lodges.
These Rulers and Governors, supreme and subordinate, of the ancient Lodge, are to be obey'd in their respective Stations by all the Brethren, according to the old Charges and Regulations, with all Humility, Reverence, Love and Alacrity.
In Ancient Charges - 1769 (James Anderson)
Almost 240 years later this very old teachings how to be raised as a Mason provoke a very interesting self-reflection on the capacity of the Craft to look its proper way: to refrain from enlarging too much the door through which the new bood is needed for the renovation of the Brotherhood; but at the same time not closing it too much for the sake of a dogmatic and sometimes irrealistic interpretation of the letter of very old rituals that have a logic that doesn't resist the effect of time. A balance is most needed nowadays if they like to prevent the Royal Art to become obsolet and no meaning to human needs.