Did the Buddhaghosa just admit to not even being a stream enterer? The wording is not clear. While it says about first fruition in the past tense ("By having reached the first fruition"), so does it says in past tense about the far future where he would meet Buddha Metteyya ("And having in my last life seen Metteyya").By the performance of such merit As has been gained by me through this And any other still in hand So may I in my next becoming Behold the joys of Tavatimsa,
Glad in the qualities of virtue And unattached to sense desires. By having reached the first fruition, And having in my last life seen Metteyya, Lord of Sages, Highest Of persons in the World, and Helper Delighting in all beings' welfare, And heard that Holy One proclaim The Teaching of the Noble Dhamma,
May I grace the Victor's Dispensation By realizing its highest fruit.
It doesn't sound very reassuring that the Venerable hopes to gain merit through this book, rather than through its study and practice, to see the next Buddha under whom he would become (stream enterer and then an) Arhat.
With best wishes,