There is a reason why Eckhart Tolle is a world renowned author. He is teaching the Buddha’s teachings, but leaving out a lot of the most important aspects which affect rebirth: Morality and Kamma.
Not many here want to consider morality because it prevents us from living a free for all, do what you please, undisciplined lifestyle. Virtually no one will awaken like Eckhart Tolle has magically. The rest of us have to do it like the Buddha did, by following moral precepts so as to put the brakes on creating bad Kamma and sit for long long hours of meditation to pierce the veil of our own deep delusion.
Adyashanti is another popular spiritual teacher teaching a pale version the Buddha’s teachings minus morality and Kamma and is massively popular. He too talks about already being enlightened, but this is not the reality. If we were already enlightened we would be completely free from all worldly/sensual desires, greed, hatred and delusion - and self interest.
The Abbot of the Buddhist monastery I stayed at in 2013, Ajahn Kevali, put it so well when I asked him. He said, yes it’s like there is a mirror and it’s perfect and reflects reality accurately and free from distortions but we have dirt on our mirror and so cannot see the reality of what we really are in the mirror or much of reality at all, it’s like looking into a wavy pond.
The truth is, not only do we have dirt on our mirror, we are trying to clean it with a sullied cloth because of lacking true virtue or Sila as the Buddha taught and we’re adding new dirt to the mirror all the time compounding our work and making it even more difficult to see clearly. It’s like we are thinking we are cleaning the mirror but are only smearing the dirt around and pushing it to different areas of the mirror and not removing it, or removing some of it, pushing the rest to the sides of the mirror, seeing something new and forgetting about the rest of the mirror - the whole mirror or the whole reality. We see something we were not aware of before and think the job is done, but there is so so much more to do, so much more to purify to truly be able to see the depths of our lives and reality.
Awakening cannot happen by hearing words from another or having a lackadaisical practice. It took the Buddha - The Awakened One - 6 years of intensive meditation to awaken. Adyashanti used to meditate 14 hours a day, but teaches that you don’t need to go that hard to awaken. The fact is that he did go that hard and he appears to have awakened.
There are 2 types of Buddhas. One has awakened but cannot teach the path to awakening truly, Eckhart Tolle and Adyashanti, Mooji and others are potentially this kind of Buddha (A Paccekkha Buddha). The other type is far more rare. The 2nd type is a Samasambuddha (Someone who has awakened fully and knows and can teach the full path to awakening.
Eckhart Tolle and Adyashanti and Mooji and Gangaji talk about awakening and what it feels like to be Awakened, but they do not teach the steps of how to awaken. They rarely mention the Buddha because their teaching is one that is selling books and retreats. The true Dhamma is free and is taught by the Sangha freely.
You can read the instructions for awakening at www.SuttaCentral.net and www.AccessToInsight.org for free and all that is left to do is to contemplate the path to Awakening and walk it (practice meditation). There is no question, if we follow the path to awakening laid out by The Awakened One our lives will “slant towards Nibbana.”