To solve a problem or to reach a goal, you don't need to know all the answers in advance. But you must have a clear idea of the problem or the goal you want to reach.
Bio: Mostafa Mohammad Najjar is an Iranian politician and former army general. He was interior minister of Iran from 2009 to 2013 and minister of defense in the first cabinet of Mahmoud Ahmadinejad from 2005 to 2009. He is also a veteran of the IRGC.