yoda prophesy

"Always know you to walk alone, the Council does," he said. "Underestimate Ventress, you do. Skilled, she is. Her help you must take, or fail you will."
Kenobi felt a not-unpleasant chill as Yoda uttered the words. He knew what that meant. Few were stronger in the Force than Yoda, and while the diminutive green-skinned Master was always humble and cautioned that one could never predict the ever-changing future with complete accuracy, there were some things that he simply knew to be the right path. This was one of them.
The rippling in the Force told Kenobi that his fellow Council members, all of whom were familiar with Yoda's unique insight, had sensed this, as well.

Dark Disciple, Ch. 3, pg. 25