This argument is taken from Ronald Nash’s book Faith & Reason with my own additions. Now keep in mind we are talking about a specific kind of truth.

Truth Exists. This can be shown by reminding us that it is self-defeating to deny the existence of truth. If you say there is no truth you are saying it’s true that there is no truth. If you say it’s possible that there is no truth then you are saying it’s true that it’s possible that there is no truth.Since skepticism is false then there must exist knowledge; and if there is knowledge then there must exist the object of knowledge namely truth.

Truth Is Eternal. If the world will never cease to exist, it is true that the world will never cease to exist. If the world will one day perish then it is true that the world will one day perish. But truth will abide even if the created world will cease to exists. If truth were to perish then it would be true that truth has perished. So, truth cannot perish it’s eternal.

Truth Is Mental. The existence of truth presupposes minds. Without a mind truth could not exist. The object of knowledge is a proposition, a meaning a significance; it is a thought. There is a mental nature to truth. If you were to fly to mars and see this true statement you would assume that there was intelligence on the planet. This statement contains words and meaning. It contains information about a man named George Bush. And information pressuposes intelligence:

George Walker Bush was elected president in the Uninted States of America and re-elected as president in the year 2004. All triangles have three sides. Knowledge presupposes minds.
Truth is superior to the human mind. Unchanging truth cannot be subjective or individualistic. Some truths are not only necessary but universal.  They are true in all  places whether or not we are aware of it. Therefore truth must transcend human reason because the human mind is finite and mutable and subject to error.Since truth is unchanging, eternal, and mental then truth must exist in an eternal mind. There must exist a Supreme Reason. A personal living God.

George Walker Bush was elected president of the United States in the year 2000.This was true yesterday and the day before that and it will be true tomorrow, the next day, the next day. It’s unchanging it stays the same. It’s always true. (eternaly true)

It’s true that if God didn’t exist then it would be true God doesn’t exist. God knows that if God didn’t exist then it would be true God doesn’t exist.

2+2=4. God knows 2+2=4

If God is all powerful then God knows that God is all powerful.

If God is omnipotent then God knows that God is omnipotent.

It’s true that something cannot be true and not true at the same time and in the same sense. God knows that something cannot be true and not true at the same time and in the same sense.

There must exist an eternal personal God. And since that is true it’s always true. It will always be true. Eternaly true. Always. Forever.