This is one key datum from everything Haanel. Note here that this is also key to other belief systems. Huna holds as one of its seven principles: "To Love is to be Happy With". A Course in Miracles has the dichotomy of Love and Fear to one of the key principles.
18. The principle which gives the thought the dynamic power to correlate with its object, and therefore to master every adverse human experience, is the law of attraction, which is another name for love. This is an eternal and fundamental principle, inherent in all things, in every system of Philosophy, in every Religion, and in every Science. There is no getting away from the law of love. It is feeling that imparts vitality to thought. Feeling is desire, and desire is love. Thought impregnated with love becomes invincible.
In Go Thunk Yourself, Smore!, I cover this as:
0. Love exists as a primal force. Some have relegated this as a law to explain it more easily. Love is a part of creation and all construction and growth. Lack of love, or its denial, sponsors hate, fear, and anger in their various forms. Each of these attitudes are dissolved once love is supplied in sufficient quantity to overcome its lack.
But I wrote these before I really started studying Haanel paragraph by paragraph.
There are these repeating datums (Wattles covers this obliquely, while Peale takes the Christian slant on this, and King recounts the traditional Huna version above).
That's the whole point to this line of research. Find the system and learn it, then teach it to others or at least expose them to its existence.