When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us. 


Alexander Graham Bell 


Of course, a great deal depends upon a lock, but equally so, er, uh, upon the key. Well, hem, ha-hah, I always think that the fault - if fault there be - frequently lies, er, well, with the key, hmm, rather than the lock.

Bishop Proudie    (The Barchester Chronicles)