It is very good to memorize the logical points and proofs of
the Holy Books. Those proofs and evidences which establish the fact that
Bahá'u'lláh is the fulfillment of the Promises of the Holy Books. These proofs
ought to be collected and memorized. As soon as someone will ask you-What are
your proofs? - you may cry out at the top of your voice and say: "Here
they are!"
- ‘Abdu'l-Bahá (Star of the West, vol. 3, no.11, 27 Sept. 1912;
The Compilation of Compilations, vol. 1, The Importance of Deepening Our
Knowledge and Understanding of the Faith)