"At first I had intended to write in 50 volumes, but I was contended with writing 5 volumes and since the difference between 50 and 5 is a mere ZERO, my promise (of writing 50) is fulfilled by writing 5 volumes."
“Awali nilikusudia kuandika juzuu 50, lakini nimelazimika kukomea juzuu hizi 5 tu kwa kuwa tofauti ya kati ya namba hizo mbili(50 na 5) ni ile sifuri iliyoko kwenye 50, kwa ajili hiyo ahadi yangu(ya kuandika juzuu 50) imekamilika kwa kuandika juzuu hizi 5”.