Jack Cai, the 3x blindfold Rubik's Cube World Record setter, shares insights into speedcubing and seeking difficulty. He discusses his journey to becoming a world-class cuber, mental challenges of solving blindfolded, and his growth mindset. The podcast explores childhood obsessions, training methods, approach to solving, and the atmosphere of Rubik's Cube competitions. They also discuss dreams, kindness, emotional conversations, and wrap up with lessons on growth mindset.