Past experiences show that we have a far greater probability of reaching our target if the current rate of underlying inflation has started rising towards our inflation target. All in all, having experienced a prolonged period of too low inflation, what we want to prevent most of all is a premature tightening of monetary policy.
Especially in the current environment of great uncertainty, a premature tightening could have disastrous consequences for people and would certainly not result in a sustainable end to low interest rates. A tightening of monetary policy would choke the nascent recovery and once again 5/9  BIS central bankers' speeches  jeopardise the achievement of our inflation target.