@Elmud,
The closest phrase I could find to the above in the Bible is Hebrews 13:8. In the passage, the author seems to be trying to assert the traditional elements of the new Christian faith; this makes sense because the Epistle was targeted at Jews.
13:8 Jesus Christ is the same yesterday and today and forever.
The following phrases are interesting. They have some humor today, I think:
9Do not be carried away by all kinds of strange teachings. It is good for our hearts to be strengthened by grace, not by ceremonial foods, which are of no value to those who eat them. 10We have an altar from which those who minister at the tabernacle have no right to eat.
After asserting that Jesus preached the true word of God, or whatever we might call it, the author goes on to talk about strange teachings (as if Jesus' teachings were not strange), mocks ceremony, and then mocks "those who minister at the tabernacle", that is, the Temple priests.
To the question, though: this agree/disagree distinction is a little strange, I think. It depends on how one interprets the passage. In Buddhism, true and honest dharma does not change, it is always good teaching. Similarly, the teaching of Jesus are enduring. Clearly the teachings of Jesus were significant at the time of this Epistle's writing, but by including "yesterday" this implies that the teachings are also in line with the teachings of past Prophets who were often institutional shakers. And of course, by saying "forever" the author implies that the teachings will be eternally relevant: something you can pass on to future generations, something worth passing on.
So, let's just say that I like the phrase.