Yes, he has studied and listened to Eckhart's teachings OR both have come to the same truth by experiential learning. Either way, this is THE truth as we humans can see it. Nothing else.
These occasional glimpses were seen while the seeker was seated at the feet of the Master. The works of Eckhart Tolle also inspired him to get these insights. Illusion The challenge before us is get away from the spell cast by the magician of the senses and the mind. So long as we are caught up in the spell, we believe that the world as suggested to us is solid, lasting and beautiful. When the seeker occasionally takes a peep out of the net, he sees that world is ephemeral and as a void, neither beautiful nor ugly. However the magician is quick to spot the odd fellow who peeps out, and pulls him back to the fold. Most people are content with remaining inside the magician’s net. We believe that we see with our eyes and hear with the ear etc... However, in reality the physical organ of the eye is not enough for us to see. Our eyes are intact when we are in dreamless sleep. Some people in fact sleep with the eyes wide open. Even the dead body still has the physical eyes. However, the dead body does not see. Neither do we see in dreamless sleep. What is the common component missing in deep sleep and in dead? It is the mind. It is clear that it is a combination of the sense organ mental object and the mind that sees, hears etc... Then we realize that the physical world is a creation of the mind. What we see is an empty drama, devoid of substance, where endless shadows of our own minds are projected on the infinite screen of the void. Why do we say that we live in a world of illusion? Isn’t the world as shown by the senses True and Real? For day to day life and practical purposes they are true and real. But in the context of ultimate Reality, they are not real. We witness the drama of illusion in perspective when we retrace our steps back to the origin or the source. When light falls on the pupil of the eye or the sound falls on the ear drum, it is in effect interplay of elements. Light and sound cease immediately after they come to contact with the eye and the ear respectively. We have no role in this interplay, as much we have no role when the image of moon falls on the lake or a mirror. Neither of these two has a mind. However, since we have a dimension called the ‘mind’, the shadow that falls on the eye is picked up and eventually using its own stored memory, it attributes endless labels such as John, Mary, Father, Mother, Sinhalese, Tamils, etc. We do not stop there, but proceed to give value judgments such as good, bad, beautiful etc. We believe them to be real and rarely reflect that this entire “Reality” is founded on data provided by the surroundings. above quotes from the Greatest teacher from Srilanka~search for more on youtube Master Siriwardana.