[Someone] asks, "The masters who spread the teachings through our country in previous ages had all entered Tang
I [Dogen] say:
The reason that past teachers of human beings did not transmit this method was
that the time had not come.
[Someone] asks, "Did those masters of former ages understand method?"
I say: If they had understood it, they would have made it known to all.
From: Talk on the Wholehearted Practice of the Way - Kosho Uchiyama (with Shohaku Okumura, Taigen Daniel Leighton)