If ever he was impelled to cast sin from him and to repent the impulse that moved him was the wish to be her knight.
They embraced softly, impelled by the grey rainy light, the wet silent trees, the shield-like witnessing lake, the swans.
There are no more uses of "impel" in the book.
Show samples from other sources
When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another ... that they should declare the causes which impel them to the separation.
Thomas Jefferson -- The Declaration of Independence
The only explanation which I could think of for this mass exodus was that I had somehow disturbed the wolves so seriously they had felt impelled to abandon their den.