In the beginning of his human life man was embryonic in the world of the matrix. There he received capacity and endowment for the reality of human existence. The forces and powers necessary for this world were bestowed upon him in that limited condition. In this world he needed eyes; he received them potentially in the other. He needed ears; he obtained them there in readiness and preparation for his new existence. The powers requisite in this world were conferred upon him in the world of the matrix, so that when he entered this realm of real existence he not only possessed all necessary functions and powers but found provision for his material sustenance awaiting him. Therefore in this world he must prepare himself for the life beyond. That which he needs in the world of the Kingdom must be obtained here. Just as he prepared himself in the world of the matrix by acquiring forces necessary in this sphere of existence, so likewise the indispensable forces of the divine existence must be potentially attained in this world.

'Abdu'l-Bahá