The main figure in the early days of dievturiba was Ernests Brastins (1892-1942), an outstanding personality. An artist by education, Brastins was interested in history and folklore. He was the leader of the archaeological fieldwork teams working for several years in all ethnographic regions of Latvia documenting the ancient settlements and castles. He prepared the Index of Mythological Notions of "Latvju Dainas". Most of his knowledge was autodidactic, acquired during amateur research, but still it was quite vast. The historical situation of Latvians, existing as a nation but having had no national state until very recent - the second decade of the XX century - suggested that the national identity of Latvians should be strengthened by any means accessible. Having strong national feeling Brastins came to the conclusion that there is a necessity for some "national religion" to preserve the nations identity in more or less hostile circumstances. Therefore the national idea plays an important role in the system of dievturiba. The very structure of the Catechismus Teoforii - the catechism of dievturiba - is determined by the permanent comparison to Christianity, denying the latter as a religion of an other nation unsuitable for the Latvians because of many factors. Opposition to Christianity is also very strong in dievturiba, since Latvians were Christianized by German crusaders - invaders coming with fire and sword and covering their actions by "bringing the light to the ignorant". Actually it is hard to determine which was the main factor in this denial.
The mythological system of dievturiba includes several trinities - the trinity of deities (Dievs - Mara - Laima, three deities of fate), the three-partiality of a human being (consisting of flesh, soul and 'velis' - astral body). Taking into account that "3" is considered to be a magic number in not only Latvian tradition, the triads of Hegel were already known by that time, it seems likely that these trinities are substantial constructions, as most of them (if not all of them) cannot be proved by the material.
The main concept of the system is the idea of a single god, refusing any rights of the heavenly bodies mentioned in the folklore texts. God is the origin of the world, inexplicable and cannot be described adequately. He is present in the world itself; everything tangible, visible or audible is a manifestation of God.
Still the monotheistic system becomes more complicated with the introduction of three appearances of God: Dievs (God, heavenly ruler, the original idea), Mara (the ruler of the material, a female goddess[?!]) and Laima (the ruler of the fate, goddess of destiny). If the system is monotheistic, then these separate manifestations of God become ambiguous, even more with the fact that Dievs is just a part of this trinity at the same time being the whole constituted by them.
According to dievturiba the human being consists of three parts - miesa, dvesele, velis (the flesh, the soul and - causing the greatest problems in translation - the astral body). At the same time the last two notions correspond to some extent with the German Seele and Geist. According to dievturiba, the soul is eternal, it comes from the god and goes back to him after the death of the body where it lives according to the experience and deeds during the human lifetime. The astral body is more material, it stays near the body, gradually melting and disappearing - it is what we may perceive as a ghost. The notions of dvesele and velis in the folklore material are so intertwined that actually it is not possible to separate them and determine their meanings exactly. At the same time any interpretations may be taken for equally valid.
These are the main concepts recognized by all adherents of dievturiba. Still, differences in treatment of different concepts are to be found. As well as changes in the course of time.