Calculating the brain power needed to lift a mass involves the formula Brain Power = M g h / t, where M is mass, g is gravity, h is height, and t is the time taken to lift. The discussion highlights that brain power is inversely related to the difficulty of the task; easier tasks require more brain power while harder tasks may indicate less cognitive effort. However, the consensus is that this calculation is a rough approximation and lacks practical application, leading to the conclusion that lifting with the mind is not feasible. The conversation also humorously notes the impracticality of using one's head for lifting due to potential neck issues. Ultimately, the thread concludes that there is little meaningful discussion to be had on the topic.