You may ask: did the thought-pictures current in days of old accord more fully with man’s nature when his thinking was full of life? The answer is, Yes—and I will indicate the reason to you.

The human being of today is engrossed from his birth to his seventh year in developing his physical body; then comes the point where he can develop his etheric body as well—this takes place from the seventh to the fourteenth year. Then from the fourteenth to the twenty-first year he develops his astral body; until his twenty-eighth year the sentient soul; until his thirty-fifth year the intellectual or mind-soul; and after that the consciousness-soul. It can then no longer be said that he develops but that he himself is being developed, for the Spirit Self which will evolve only in future ages, already participates to some extent in his development from his forty-second year onwards. And so the process continues.

Now the period from the twenty-eighth to the thirty-fifth year in human life is extremely important. Conditions during this period have altered essentially since the 15th century. Until then, influences had continued to come to man from the surrounding cosmic ether. Because this is no longer the case today, it is difficult to imagine how the surrounding ether could have influenced man. Nevertheless, it was so. Between their twenty-eighth and thirty-fifth years, human beings experienced a kind of inner revival.

It was as though something within them was given new life. These experiences were connected with the fact that in his twenty-eighth year a man was raised to the degree of ‘Master’ in his trade; it was not until that age that he experienced a revival—of course not in a crude but in a delicate form. He was given a new impulse. This was because the all-encompassing ether-world worked upon him—the ether-world which, as well as the physical world, is all around us.

In the first seven years of life the ether-world worked through the processes operating in the physical body of the human being. Still, it did not work directly upon him until his twenty-eighth year, when the period of the development of the sentient soul was over. But then, when he entered into the period of the intellectual or mind-soul at that time, the ether worked upon him with a vivifying effect.

This no longer takes place, and man would never have achieved independence today as an individual and a personality, had the process continued. This also has to do with the fact that the whole inner disposition of the human soul has changed since those days.

You must now accept a concept that may be extremely difficult for modern thinking to grasp but is nevertheless very important.

In physical life it is quite clear to us that what is going to take place only in the future is not yet here. In etheric life, however, this is not so. In etheric life, time is, as it were, a kind of space and what will some day be present already affects what precedes it, as well as what will follow. But this should not be a matter for wonder; it is the same in the physical world too.

Source: Rudolf Steiner – GA 222 – The Driving Force of Spiritual Powers in World History – Lecture VI – 22 March 1923, Dornach
https://rsarchive.org/Lectures/GA222/English/SBC1972/19230322p01.html