Thank you for your question!
That is a repeated question, which was answered here:
In the Sakar Murli, Brahma Baba task is to make sure the “children” know that God is their Father. To rely on God, to love God. By using the “father” figure (We know that father is a bodily relationship) Brahma Baba used the “inheritance” idea as something which God will give the children if they “do this and that” and love God more than anything else.
That “inheritance” is the Golden age. According to Gyan. The Golden age and Silver ages are called “Heaven.” The highest number of births that could be taken there is 20 (8 golden age and 12 silver age) The other “1″ birth could be in between the “official” start of the Golden age. According to Gyan, through the law of karma we will get to “go” where we deserve, so there is no such a thing as God “giving something.” However, this was an useful story at the time when trying to teach Gyan to the “children.”
Remembrance at the time of Sakar Baba was about using the mind to remember the Golden age and to remember God as tools to create “disinterest” of the “old” world. That remembrance has been changing in time as we see it in the avyakt Murlis to reflect a greater understanding and experience.
Hope this helps.