It won't get any better than this

Three weeks ago, I wrote:

Mr Blair is formidably impressive, and without doubt the most articulate, clear-sighted and instinctual politician of his generation.

Today's speech proved that: it was utterly masterful, truly mesmerising. It's what Mr Blair does best.

Which is why he should go now - he can achieve no more in that time which is left to him. Better to leave when the encomia are still ringing in your ears, than to hang around for your own wake.