Yes. And to take it a bit further...
...this only holds true from a human point of view.
In the human perspective, dualism and non-dualism are percieved continually and simultaneously. The total experience of living is a mix of both these concepts, so in order to trancend dualism I think you would also have to trancend non-dualism.
After all, the very concept of non-dualism is in itself the dualistic counterpart to another perspective.
To percieve both requires no effort. We do it by virtue of what we are.
To trancend them is to master them, in a way. To consciously create the mix of dualistic concepts that converge in a non-dualistic experience that benefits the particular moment, the supreme goal being to exist in happiness and well being. And when that point is reached, the next step becomes to do this without concious effort.
It seems to me that a person who has reached this point has achieved as near as perfect understanding and existence as is possible in our human form.