[dselectronics]

This probably answers what Esho is asking

Yes and no.

The Urban Dhamma link has a good explanation but I need to give a thought to this so to explain my self better about this issue.

Until now, what I can say is that non Soto Zen has a lot of this thing about 'Sudden' enlightenment.

Even when I can say that Zen teachings can give us 'sudden' moments of clear understanding, I can't consider that as Enlightenment or even a real progress because most of that can not endure for a long time because of a lack of methodology so to sustain it.

I tend to be more into the Gradual enlightenment and along with it, we can have sudden moments of clear and deep understanding as when we verify a teaching; and this is one aspect -of many others- I value of the teachings of Gotama Buddha.

Nobody can just 'suddenly' do mathematical modeling just with the knowledge of addition and subtraction. It is needed maturity and practice.