To achieve Moksha in this lifetime is the only reason you have a human body, and as His Divinity Brahmanda Saraswati once said: "to waste a human life by not achieving Moksha is like selling diamonds for the price of spinach!"
Lord Krishna said to Arjuna in the Bhagavad Gita (chapter 2 verse 48): "yogastha kuru karmani" or "established in union with Me, perform action." This is exactly the definition of Moksha.
Moksha is at the same time the most simple and natural way to live and the most difficult transition that anyone can make. Our universe has been around for over 150 trillion years and we have incarnated again and again to accomplish this one task - achieve Moksha - yet this accomplishment has eluded most of us so far.
Those like Eckhart Tolle who suddenly switch into Moksha for no apparent reason and without any preliminary training, find it difficult to explain to us how to live in the state of Moksha, yet they describe Moksha very well. For it is to them such a simple thing. Eckhart said: "The beginning of freedom (Moksha) is the realization that you are not the possessing entity - the thinker. Knowing this enables you to observe the entity. The moment you start watching the thinker, a higher level of consciousness becomes activated. You then begin to realize that there is a vast realm of intelligence beyond thought, that thought is only a tiny aspect of that intelligence. You also realize that all the things that truly matter - beauty, love, creativity, joy, inner peace - arise from beyond the mind. You begin to awaken."