"You needn't look further to find some big challenge. The challenge is very near at hand. That means developing and expanding along the lines as you have begun. Of course we are not ever very much anxious to repeat the same activity many times, that is the nature of the living entity, that he seeks to enjoy varieties of flavors. But mature understanding of activity means to take it as our occupational duty. That is to say, suppose I am established as good carpenter, then it will be foolish if after some time I am thinking, 'Oh, I have done this cutting of woods so many times, now it is becoming boring and uninteresting, therefore let me become a doctor,' no. That is not recommended by Krsna, neither is it common sense. Occupational duty means to stick with one type of occupation which is just suitable for me, considering that it is my duty, therefore I am throughout my life obligated to perform it to the best of my ability. This is mature understanding of occupation. That means I must not leave it even for so-called good cause, just like Arjuna wanted to stop his fighting activity just to avoid killing so many of his kinsmen, cousin brothers, and other friends. So we are preachers on behalf of Lord Krsna, that is our occupational duty, we haven't got to search any further some new challenge or change our engagement. No, that has been already settled up. Now best thing will be to develop more and more what we have begun."