When you are first learning the sixth jhāna, there might not seem to be a whole lot of difference between the fifth jhāna and the sixth. It’s a subtle shift unless your concentration is really strong and you are quite familiar with the qualities of both jhānas. It’s very helpful to go back and forth a few times between jhānas five and six—1-2-3-4-5-6-5-6-5-6—staying in both five and six for at least five minutes each time
