castles in the air

unprecedented and never to be duplicated;the first and the last;unmatched;unique

Holding onto old ideas

take measures without regard to changes in circumstances (lit. a notch on the side of a boat to locate a sword dropped overboard)

Never forget

to brook no delay;to demand immediate action

to be free with other's money

creation of the world;since the beginning of time

blaze new trails and forge ahead

the benefits of education (lit. opening a book is profitable)

speak frankly and sincerely (lit. deal sincerely and fairly)

open one's heart to

the friendship between gentlemen is as pure as crystal; a hedge between keeps friendship green

to concentrate one's attention

a foot's move sways the balance;to hold the balance of power;to play the decisive role

learn by analogy;to deduce many things from one case (lit. to raise one and infer three)

attract worldwide attention

nothing can compare to this

(saying) world famous

to give the last measure of devotion