If I am asked what we are fighting for I reply in two sentences: In the first place, to fulfil a solemn international obligation, an obligation which, if it had been entered into between private persons in the ordinary concerns of life, would have been regarded as an obligation not only of law but of honour, which no self-respecting man could possibly have repudiated. I say, secondly, we are fighting to vindicate the principle which, in these days when force, material force, sometimes seems to be the dominant influence and factor in the development of mankind, we are fighting to vindicate the principle that small nationalities are not to be crushed, in defiance of international good faith, by the arbitrary will of a strong and overmastering Power. I do not believe any nation ever entered into a great controversy - and this is one of the greatest history will ever know - with a clearer conscience and a stronger conviction that it is fighting, not for aggression, not for the maintenance even of its own selfish interest, but that it is fighting in defence of principles the maintenance of which is vital to the civilization of the world.
Address to the House of Commons on the declaration of war with Germany, August 6th, 1914 Outbreak of War]
We had better wait and see.
Phrase used repeatedly in speeches in 1910; see Roy Jenkins, Asquith, ch.14