The advancement of all sciences, especially where there has been such a radical change, have been attended with persecution.

For me, 'revolution' simply means radical change.

The problem is that it takes physicians so long to accept a radical change. And the lag is unacceptable.

Whenever culture has gone through a radical change, as ours has - from industrial age to information age - there are people who will deny that things have changed; they resist it and refuse to change.

The time draws near, when a radical change must take place for the whole world in the management of diplomacy.

The conservative who resists change is as valuable as the radical who proposes it.