In the first sentence you specified, he talks about people who focus on making money, having power, having health and abundance WITHOUT any cause. Which means that without any cause to support all that effects, it is futile to expect to have them. For example, why do you think you want good health? Many people will just wish for better health without having good intentions like 'make this thought a reality', etc.

In the next sentence you specified, he talks about the principle of concentration; which is obvious for us to understand because the more we concentrate on something the better we can do that task effectively. This sentence applies to situations where we apply it so that we get good results from that situation.

yes , i too have studied the master key system and it can be heavy going sometimes ,

the depth of thought and the way it is presented can be confusing .

when you finish all the 24 readings , things will become clearer .

in the meantime remember the key words for chapter 7 - The Power of Your Imagination .

happy continuation

The world without is the physical world meaning all that can be perceived by human eyes. The world within is my own personal space that cannot be perceived by human eyes. The world within is the space that appears to exist within and it's where thoughts and emotions appear.

To consciously create I consciously create the vibrational energy of that thing I desire through thoughts and emotions which are really different ways of expressing the same energy.

Focus on the world within @Joe Alvarez, as I said as blubird two "remember the key words for chapter 7 - The Power of Your Imagination"

@Joe Alvarez, And anyone reading this post, 12-20-22 These two sections are not contradictory but complimentary. Section 20 emphasizes that money, health and power are external happening as a result of a 'cause' within. Section 24 emphasizes to visualize and focus on what you wish to have rather than what you do not. Here it does not mean that you visualize it in the external world. It means you idealize, visualize, create mental images of what you want, concentrate on it. Iterate on improvising the inner image. In your inner mindscape, if you want a home, visualize a beautiful home with all it's finest details. Do not create images of poverty, lack of any sort. 12-21-22 - After thinking through your original question - Should we focus on external or not - Haanel did not ever advise to try and fix the external world, appearance or conditions in his 24 parts. However, out of common sense I am writing this that we can change the external conditions but they are not permanent. For example, if you are feeling hot, you open the window to let air flow in so you are relieved of the hot condition. If you are suffering from headache you use a pain killer. but in any case, any attempt to change the external condition is like fixing the symptoms and not the cause.