In human history, no one has gained enlightenment through Zen or meditation. Buddha never claimed to have attained enlightenment through meditation. So a genuinely enlightened creature may point out things precisely as they are in actuality and grasp the law of how the universe operates. However, it is not possible for most people to do this because they lack wisdom. People often wonder if meditation is the only way to enlightenment. Meditation is just a tool used by many great teachers over history to bring people closer to reality. But it is not the reality itself. A person who knows everything about you yet still has opinions about what kind of tea to drink after dinner: This person isn't fully aware. Only someone who lacks judgments about tea and food needs to be identified with in order to see their true nature. The only thing we can be sure will lead to enlightenment is death. Because once you die, you can no longer take advantage of future lives to work on yourself. You need to let go of your ego completely so that there's nothing left to protect or preserve. Then you'll be free from suffering.