What are the other principal tenets of Freemasonry?

Brotherly Love, Relief, and Truth form the three principal tenets, as recognized by the United Grand Lodge of England, the Grand Lodge of India, and the Regional Grand Lodge of Southern India.

Relief is defined as a duty incumbent on all men, but particularly among Masons, aiming to soothe the unhappy, sympathize with misfortune, and restore peace to troubled minds 1. Truth is held to be a divine attribute and the foundation of Masonic virtue, requiring sincerity and plain dealing, with heart and tongue joined in promoting mutual welfare 1.

Alongside these three tenets, early instructional lectures emphasize four cardinal virtues: Temperance, Fortitude, Prudence, and Justice 1. Temperance imposes a due restraint upon passions to guard against vice and licentious habits 1. Fortitude supplies strength of mind to pursue virtuous designs unshaken by danger or affliction 1. Prudence is defined as the ability to judge what is best in both ends and means 1.