Mat 24:35 Heaven and earth shall pass away, but my words shall not pass away.

Mat 24:35 The universe and society passes by, but my words shall not pass away.

Christ is saying that the physical world is temporary, but that the world of the mind, the realm of ideas, is eternal. Notice that here, in referring to a real "end" of the universe, Matthew does not have Christ using the word that can mean the purpose of things (telos), but rather the verb meaning "passing by," which indicates both what it is temporary and what is changing.

In the larger context of this chapter's themes, Christ is saying that the darkness of the false prophets represent the physical and society (the universe and the earth) and our natural fear and ignorance. However, this darkness is temporary. The light of knowledge and ideas remains both stable .

"Words" is from the the Greek logos, which means "word," "computation," "reckoning," and "value." It is also "an explanation," "an argument," or "a rule or principle of law."

"Pass" is from parerchomai, which means "go by," "pass by," "outstrip" (in speed), "pass away," "outwit," "past events" (in time), "disregard," and "pass without heeding."