His commands involving those four all - embracing expressions raise some important questions, which can be summed up in the words why? where? what? and when? Let us consider the questions one at a time.
এতিয়া আঁহক আমি ক্ৰমান্বয়ে সেই প্ৰশ্নবোৰৰ বিষয়ে আলোচনা কৰোঁহঁক ।