The companions of God are, in this day, the lump that must leaven the peoples of the world. They must show forth such trustworthiness, such truthfulness and perseverance, such deeds and character that all mankind may profit by their example… I swear by Him Who is the Most Great Ocean! Within the very breath of such souls as are pure and sanctified far-reaching potentialities are hidden. So great are these potentialities that they exercise their influence upon all created things." (Baha’u’llah, quoted by Shoghi Effendi in ‘The Advent of Divine Justice)