He knows that he will come under sharp domestic pressure to revert to hard power if the mix of charm and intellectual persuasion he has displayed does not lead to tangible European response.
So, with Vladimir Putin back in the presidency, Russia has reverted to hard power.
If the battery runs out, the bicycle reverts to pedal power only.
With these latest decisions, and the continued absence of an elected parliament, legislative powers revert from Scaf to Morsi.
After the crew shut down one engine, the other engine apparently reverted to the power indicated by "the last valid throttle lever position," according to the safety board.
The unbroken-succession of coups of recent years has now been interrupted, in a manner of speaking, by reverse coups, in which power reverts to the people... A shift in the political climate of the world seems to favor liberty.
Above all, we should be leading the world in energy conservation and switching from fossil fuels to renewables, rather than reverting to nuclear power with all its risks and downsides.
Alan Salazar, an adviser to Mr Hickenlooper, fears that when power reverts to the Republicans in Colorado, Democrats, too, may be tempted to resort to recalls when they lose arguments.Colorado used to be a place where elections were won and lost on the doorstep, laments Rob Witwer, co-author of The Blueprint, a history of state politics.
But they left that sense of verve and ambition in the changing rooms at half-time, reverting to a power game that ultimately squeezed the life out of the Scots.
Privacy advocates say there are plenty of options should the Patriot Act provisions lapse and intelligence agency power reverts to what it was in October of 2001, before Congress authorized bulk data collection.
