Mr. Lincoln's elevation shows that in America every station in life may be honorable; that there is no barrier against the humblest; but that merit, wherever it exists, has the opportunity to be known. ↗
We are of the opinion that an important and irreversible process is taking place among the white population. Just as with the blacks, the whites, too, are currently overcoming a psychological barrier. ↗
The natural barriers between England and Scotland were not sufficient to prevent the extension of the Saxon settlements and kingdoms across the border. ↗
It does not seem, however, that organic chemists were much worried about barriers to rotation in organic molecules in general at that time because there was no technique available to demonstrate the phenomenon experimentally. ↗
To jump and break the sound barrier will not be a mere record breaking experience or another extreme event that ends once the mission is accomplished. ↗