Eight is a number that represents new Beginning, a new Order a new covenant, represents the outpouring of The Holy Ghost in The word of God.
As the old saying goes, "Birds of like feathers flock together". Eagles do not mix with other birds but always only enjoys to fly in the high altitude
Give, and it will be given to you. Good measure, pressed down, shaken together, running over, will be put into your lap. For with the measure you use it will be measured back to you"