September 14

…the contingent world is the source of deficiencies and God is the source of perfection. The very deficiencies of the contingent world testify to God’s perfections. For example, when you consider man, you observe that he is weak, and this very weakness of the creature betokens the power of One Who is Eternal and Almighty; for were it not for power, weakness could not be imagined. Thus the weakness of the creature is evidence of the power of God: Without power there could be no weakness. This weakness makes it evident that there is a power in the world.

Again, in the contingent world there is poverty; hence there must be wealth for there to be poverty in the world. In the contingent world there is ignorance; hence there must be knowledge for there to be ignorance. If there were no knowledge, neither could there be ignorance; for ignorance is the non-existence of knowledge, and if there were no existence, non-existence could not be. 
- ‘Abdu’l-Baha  (Table talks in Akka, authenticated by ‘Abdu’l-Baha; ‘Some Answered Questions’ – 2014 revised translation by the Baha’i World Centre)