The Trinity concept of revealed religion must not be confused with the triad beliefs of evolutionary religions. The ideas of triads arose from many suggestive relationships but chiefly because of the three joints of the fingers, because three legs were the fewest which could stabilize a stool, because three support points could keep up a tent; furthermore, primitive man, for a long time, could not count beyond three.

Aside from certain natural couplets, such as past and present, day and night, hot and cold, and male and female, man generally tends to think in triads: yesterday, today, and tomorrow; sunrise, noon, and sunset; father, mother, and child. Three cheers are given the victor. The dead are buried on the third day, and the ghost is placated by three ablutions of water.

As a consequence of these natural associations in human experience, the triad made its appearance in religion, and this long before the Paradise Trinity of Deities, or even any of their representatives, had been revealed to mankind. Later on, the Persians, Hindus, Greeks, Egyptians, Babylonians, Romans, and Scandinavians all had triad gods, but these were still not true trinities. Triad deities all had a natural origin and have appeared at one time or another among most of the intelligent peoples of Urantia. Sometimes the concept of an evolutionary triad has become mixed with that of a revealed Trinity; in these instances it is often impossible to distinguish one from the other.

The first Urantian revelation leading to the comprehension of the Paradise Trinity was made by the staff of Prince Caligastia about one-half million years ago. This earliest Trinity concept was lost to the world in the unsettled times following the planetary rebellion.

The second presentation of the Trinity was made by Adam and Eve in the first and second gardens. These teachings had not been wholly obliterated even in the times of Machiventa Melchizedek about thirty-five thousand years later, for the Trinity concept of the Sethites persisted in both Mesopotamia and Egypt but more especially in India, where it was long perpetuated in Agni, the Vedic three-headed fire god.

The third presentation of the Trinity was made by Machiventa Melchizedek, and this doctrine was symbolized by the three concentric circles which the sage of Salem wore on his breast plate. But Machiventa found it very difficult to teach the Palestinian Bedouins about the Universal Father, the Eternal Son, and the Infinite Spirit. Most of his disciples thought that the Trinity consisted of the three Most Highs of Norlatiadek; a few conceived of the Trinity as the