The outward powers are five: the power of sight, of hearing, of taste, of smell, and of feeling. The inner powers are also five: the common faculty, and the powers of imagination, thought, comprehension, and memory.
As the Bab gave his life so that Baha'u'llah should live, Baha'u'llah and 'Abdu'l-Baha gave their lives that the Davidic lineage should last for ever as the Presidents of the true Universal House of Justice of Baha'u'llah. The line of David has continued safe in America from the days of the Master's visit to that continent in 1912 when he rested for a day in the Rocky Mountains and where God has established his seed for ever.