I have felt prompted to make these things clear to you in order to give you, in advance, some idea of the serious and vast nature of what I am working with, and in order for you to understand that my lectures do not constitute some easily understood evening entertainment, but are on the contrary a sphere of activity where you need the whole of your concentration, your focussing of thought and an impartial attitude to get even a few glimpses of the immense divine principle of wisdom that a higher world administration has now decided should be realisable even in the zones of the earth.

Make this lower case.
i have felt prompted to make these things clear to you in order to give you, in advance, some idea of the serious and vast nature of what i am working with, and in order for you to understand that my lectures do not constitute some easily understood evening entertainment, but are on the contrary a sphere of activity where you need the whole of your concentration, your focussing of thought and an impartial attitude to get even a few glimpses of the immense divine principle of wisdom that a higher world administration has now decided should be realisable even in the zones of the earth.