Discretion is the better part of valor. Prevention is better than cure. The second mouse gets the cheese.

Sometimes, caution is the way to go.

So the Knicks have listed Tyson Chandler as “questionable” tonight against the Celtics in Boston. Chandler has missed the last six games, primarily because of a bulging disk in his neck, although he also has battled a bone bruise in his left knee.

No determination will be made until after the morning workout, coach Mike Woodson said, but Chandler will play if he says he can.

The knee, Chandler said yesterday, is fine. The neck, not so much. Despite longing to return, he admitted he doesn’t want to rush back and make matters worse, although “there’s definitely a chance” he will play tonight.

“That’s what I have to be smarter with. It’s tough watching games. It’s a little better right now since we’re winning, but it’s really tough watching my teammates fighting and not being able to be out there,” Chandler said. “All of me wants to be out there obviously, but then again I’ve got to be smart for my teammates at the same time.”

Chandler, who only shot yesterday at practice before a light one-on-one workout with Chris Copeland during which he consulted with the medical staff, was asked what he needs to see and feel before determining he is ready.

“I need to not go into a spasm whenever I’m in a vulnerable position, whether reaching to block a shot or in a defensive stance. Right now, it’s still a little sore. Hopefully, [today] go through shoot-around,” Chandler said.