Today, when I talk about the "Human Completion Plan", the story line of "Evangelion" is much more straightforward than the intricate inner description of the characters in the film, and most of the settings can be figured out through the dialogue of the characters. This article will break down the "Human Completion Plan" into several parts and introduce it to you in the most concise way.
The purpose of "completion" is to return all human souls to Lilith, eliminate the A.T. position between people, so as to eliminate estrangement, disputes, and differences, so that human beings can obtain real evolution. However, according to SEELE, the apostles are the rightful heirs of the earth, and they see "the completion of mankind" as a means of atonement, which actually coincides with Christ's view that "all men are born sinful."
The way to achieve this is clear: on the agreed day, when Lilith is executed with the gun of Longinus, the tree of life will be reborn, and all life born from Lilith will return to its roots. Of course, in order to avoid accidents, SEELE also specially prepared a replica of Lilith, that is, the first machine. In fact, in the theatrical version of "True For You", SEELE has been forced to helplessly use the "backup plan" of the first number machine.
The Gun of Longinus was originally inserted into Lilith's body, but then, under the pretext of defeating bird angels, Tsubasa ordered it to be thrown over the moon in order to hinder SEELE's plans.
Yuandu himself made a small calculation, and his plan was to let Adam and Lilith fuse, so as to control the fully formed Lilith and fulfill his wish to see Lingwei again. Ayapolis is the soul vessel of Lilith, and in the end she should have obeyed Tsubasa's will to help him fulfill his wishes. However, Tsubasa did not expect that after Ayapolis met Shinji, her feelings changed, and she finally chose to betray Tsubasa and go after Seigento.
The "promised day" is easier to understand, and will not come until all the apostles have been defeated. So before Nagisa was defeated, Lao Ding said to himself that his wish was about to come true. In addition, Dingyuandu also deliberately arranged the base in Lilith's location, attracting the apostles to attack NERV one by one in order to defeat them more efficiently.
In fact, the apostles did not come to find Lilith, they had only one purpose, that is, to return to Adam. But even Nagisa mistakenly thought of Lilith as Adam, and the other apostles couldn't tell whether it was Adam or Lilith in the NERV base. In addition, although the apostles' return to Adam will cause an impact to destroy humanity, they do not have direct malice toward humanity, but just want to return to the "mother".
In the theatrical version of "True For You", the agreed day + Longinus's gun + the first machine (spare Lilith), these three conditions are finally put together, and the ceremony officially begins. However, this ceremony did not follow the plan of either SEELE and Dingyuandu to the end. Seele's plan did not require Adam to fuse with Lilith; in Yuandu's plan, there was no need to use Longinus's gun to execute Lilith.
However, these conditions were finally put in place, and this ending exceeded the expectations of both sides, and eventually led to an interesting phenomenon: Zhensi was given a chance to choose. Whether humanity will continue to exist with the Tree of Life as an ark, or disappear all according to the original script, is between the thoughts of Zhen si.
It's just that in the end, the choice made by Zhenji is still "let's all die", and human beings have not survived because of this glimmer of life. Except for Shinji himself, and Asuka, who had subconsciously turned to him for help, everyone else had returned to Lilith. The "Human Completion Plan" was also announced in an unplanned way.
Finally, I recommend that you search for the keywords of "Evangelion" on today's headline App, which has detailed interpretations by various authors from different angles.