The word impossible is not in my dictionary.

Impossible is a word to be found only in the dictionary of fools.

The best way to keep one's word is not to give it.

Riches do not consist in the possession of treasures, but in the use made of them

International incidents should not govern foreign policy, but foreign policy, incidents

Luckily," he went on, "you have come to exactly the right place with your interesting problem, for there is no such word as 'impossible' in my dictionary. In fact," he added, brandishing the abused book, "everything between 'herring' and 'marmalade' appears to be missing.