Simplify the following text for a Grade 6 native English-speaking person.
Original: Keating knows that his most successful projects were aided by Roark , so he asks for Roark 's help in designing Cortlandt .
Simplified: Keating wants Roark to work for him so that he can steal some of Roark 's ideas . Keating decides to help Roark , because Roark has finished some of his projects at college and at Francon & Heyer .