Fortify yourself with contentment, for this is an impregnable fortress.
There is no man who desires as passionately as a Russian. If we could imprison a Russian desire beneath a fortress, that fortress would explode.
There are no fortresses that Bolsheviks cannot storm.
The fortress of Europe with its frontiers must be held and will be held too, as long as is necessary.
I was thinking, too, of Superman and his fortress of solitude.
Pride is a fool's fortress
With the Berlin I was able to set up a fortress that he could come near but not breach.
A language which we do not know is a fortress sealed.
A mighty fortress is our God, a bulwark never failing: our helper He amid the flood of mortal ills prevailing.
Hitler built a fortress around Europe, but he forgot to put a roof on it.