This book contains conversations of Holy Mother Sri Sarada Devi, originally in Bengali, and recorded by her disciples. The English translation is simple and attractive and has a close affinity to the original. It also contains a biographical introduction by Swami Nikhilananda.
My child, what I want is muscles of iron and nerves of steel, inside which dwells a mind of the same material as that of which the thunderbolt is made.
-Swami Vivekananda