1. At the ultimate level Truth cannot be believed only experienced.
2. Truth is God, the law of nature is truth.
3. Tolle experiences truth, one cannot think truth.
4. Read his books.
Depends on how you interpret words, words have different meanings to different people.
2. Buddhism has no God nor does it consider any natural law ultimate.
Based on point 1 it follows that:
3. Since you cannot believe in truth you cannot tell what truth is, neither can one know what some other people experience, making truth completely incommunicable and subjective.
4. Since truth cannot be told it can't be written either.
"While teachers of the middle way, mind only, transcendent wisdom, mantra, and other schools may have their own assertions, the fulfillment of those intentions is the same. There is not a single thing that is not contained within mind."
(Gampopa to Düsum Khyenpa, in "The First Karmapa", KTD Pub, p254)
“If you recognize the world of appearance and existence as the mind, realize the mind itself as empty, and have no grasping at the superiority of your realizations — this is the ultimate view."
(Chegom Dzongpa, in "The Book of Kadam", Wisdom Pub, p609)