Natalie Portman says acting has always scared her — because she is constantly worried people won’t find her performances believable. The actress — who recently revealed she finds the recession “exciting” — is planning to focus on directing films in the future, but admits the prospect is equally as terrifying as being in front of the camera. “I really love directing,” she said. “Fear is intrinsic to everything you do as a creative person. “You’re constantly putting yourself up there to be trashed. If I thought about it too much, I’d just be crippled. I’d rather create.”