"The truth is true and nothing else is true"
Here's the facts.
1) God established what is true, forever. It is permanent and cannot be changed by anyone.
2) You have only two options.
a) Accept that it is true and be glad that the truth is loving.
b) Reject the truth and pretend it is not true and suffer.
You have no other choice. Acceptance or denial.
Acceptance aligns you with Life. Denial aligns you with death.
When we reject the truth and go into denial, we simply are not willing to admit that we cannot change the truth. We start believing that we can change it, and that we have. That's the idea of sin and it puts us into ego thinking. It's also the authority problem because now we believe we can change God.
This is a very uncomfortable truth for the ego. It literally means up there on the hill there is a shining light which shines forever, and either you can go there and be part of the light or you can hide away in a cave and pretend it's not there. But nothing you can do can stop it shining.
This means you are POWERLESS OVER GOD. You are powerless over truth. And you are powerless to change reality. "Nothing real can be threatened."
To admit this takes great willingness to surrender all egotism, all opinions, all other viewpoints, all independent efforts to decide what the truth IS, and entails a total letting go of the protest against reality. That means giving up fighting with the truth. It means stopping this insane effort to DENY that it is true and to try to make it go away.
To hide from it and to block it out of awareness produces a state of "un-consciousness" or un-awareness, also known as death. Death is the denial of the truth, the denial of life, and represents an unwillingness to admit or demonstrate that you are immortal.
We have to come out of our dark hiding place and into the light but we will only do that by dropping the ego and being VERY VERY HONEST with ourselves, radically honest, in admitting that WE CANNOT CHANGE THE FACTS. We cannot change the truth. We cannot change what God established. We cannot change what God created us to be. And therefore we MUST still be as God created us to be.
This is why the curriculum ends in the Atonement, which entails TOTAL ACCEPTANCE OF THE TRUTH. The key word there is "acceptance". It means the total surrendering of all denial, the absolute complete letting go of the authority problem, relinquishing all attempts to DENY that the truth is true, and being FULLY willing to simply ALLOW God to be God.
It's almost a moment where you'll say, okay God, I give up, I surrender, you win. Except God isn't a dictator or tyrant. His will for you is perfect happiness. And that means that by surrendering to His will and His truth and His power you SHARE in it and enjoy perfect happiness, eternal life, and peace forever.
We simply do not have the option to ESTABLISH what the truth is. It is already established by God, it is permanent, it never changes, and nothing of the ego can modify it. Either we are squirming all over the place trying to avoid admitting to it, or we are coming to it quietly and gently and accepting it with holiness and willingness. And God welcomes us home.
"Salvation is the recognition that the truth is true and nothing else is true. This you have heard before, but may not yet accept both parts of it. Without the first the second has no meaning, but without the second is the first no longer true. Truth cannot have an opposite. This can not be too often said and thought about. For if what is not true is true as well as what is true, then part of truth is false, and truth has lost its meaning. Nothing but the truth is true, and what is false is false.
This is the simplest of distinctions, yet the most obscure. But not because it is a difficult distinction to perceive. It is concealed behind a vast array of choices which do not appear to be entirely your own. And thus the truth appears to have some aspects that belie consistency, but do not seem to be but contradictions introduced by you."
... "Now do we join in glad acknowledgment that lies are false and only truth is true."