In the fourth installment of the fantastic Grantland documentary chronicling Steve Nash‘s season with the Lakers, we’re invited to a private conversation between Nash and his longtime friend and former teammate, Dirk Nowitzki.

The greatness of this series lies in its honesty, and beginning at the 8:40 mark of the video clip above, Nash asks his friend a difficult question.

“What would you do if you were me,” Nash asks Nowitzki. “Would you come back?”

“I’m not sure, bro,” Nowitzki says, after clearly struggling for a moment with his answer. “I’m honest. What you go through, all that treatment, in and out [of the lineup]. I don’t know if I could do it.”