Basically what I mean by a mind that longs for certain Birth into the Pure Land and calls upon the sacred name in all sincerity is like the mind of a thief who warns to steal another's property. Deep down in his heart he means to steal, but as far as his outward appearance is concerned, he doesn't show the slightest indication to others of his purpose by look or gesture. As other know absolutely nothing about the purpose to steal in his mind, we can say that the purpose is for himself alone, without any reference whatsoever to outward appearances. Such an undivided mind as this is is necessary in the person who wants to make sure of Birth in the Pure Land.
If one wants to follow the Buddhist path without falling prey to ego, it's best to practice with the mind of a thief.
P.S. It's been a while hasn't it?