..acceptance of what is (by Eckhart Tolle), is an externality but he did not mention the more vital and intrinsic---interiority i.e. acceptance of your inner self which is the starting point of insight and wisdom.
Perhaps he wrote in a hurry.
The next 2 sentences put the 'fully conscious person' to test in any discussion but it would be more generous for such a person to listen to what others have to say if the speakers were genuine and desirous of a meaningful dialogue--an enlightened person should not presume that the speakers were out for an argument.
There's a sense of smugness in these 2 sentences.
ET is much admired worldwide and has a huge following but has critics too as some have said that he merely synthesises Eastern thinking and much of what he wrote was unoriginal.
I leave to others to comment. I am a curious observer and learner