Acharya Prashant explains Jesus Christ's teaching that the Kingdom of Heaven is like a mustard seed, which is the smallest of all seeds but grows into the greatest of trees where birds find shelter. He draws a parallel with the Upanishadic concept of being smaller than the smallest and larger than the largest. Truth is so subtle and refined that it cannot be grasped or found through physical searching, yet it is so vast that nothing exists outside of it. While humans require boundaries and limits to perceive things, Truth is infinite and beyond the grasp of the human mind, which lives in the illusion of boundaries.