Source, in full
Note: On November 9, 1989, the Berlin Wall fell. The idea of German reunification, often discussed but considered unrealistic, once again became a subject of heated debate. Reunification now appeared inevitable, but scarcely anyone ventured to prophesy how soon it would come. German chancellor Helmut Kohl remarked those words when was accused of pushing unification plans too fast.
Notes from Wikiquote
Awake! magazine, 12 - 22 - 1991; in its article The Dream of European Unity.