Most of what Mr Tobey has to say about the individual signs is much the same as other astrologers have said, many times. What I like about these comparisons is the way a fundmental similarity can be seen, shining through the differences - something I hadn't fully appreciated before.
Mr.Tobey's comments about Aries and Scorpio can be applied not only to Sun Aries or Sun Scorpio people, but to anyone with emphasis in these signs (e.g. a cluster of planets, or Moon, ascendant or ruler of natal Sun in one of the signs.) He considered that both signs have relationship with Mars and Pluto, but states in this book that Mars rules Scorpio while Pluto rules Aries - the reverse of what most astrologers suggest. Pluto ruling Aries doesn't sound quite right to me.
(For brevity I have not copied the author's exact words throughout, and have omitted remarks about personalities who are no longer in the public eye.)
Both signs are aggressive, impulsive, but executive. Alike, but different.Illustration at beginning of post is taken from Medizinisch-Astrologisches Hausbuch, 1429. Nuremburg. (Medical Astrology Housebook). It shows Mars overseeing Aries and Scorpio.
Scorpio tends towards family or group loyalty whilst Aries is more of an individualist, independent and daring.
Both have drive but Scorpio's is emotional in source, Aries drive is vital, from the spirit. Aries initiates, Scorpio reacts. Aries burns, Scorpio boils.
Aries is the natural pioneer, able to survive alone if necessary. Business pioneers are often found to have Aries strong in their charts, and many Taureans who are pioneers are often found to have a cluster of natal Aries planets. Scorpio believes in working as a team. Wary of the stranger considering him a potential enemy, suspicious and alert for possibility of betrayal.
Scorpio expects loyalty and is badly hurt if let down by others.
The ancients associated Scorpio with sex and it is a strong feature in the Scorpio individual, but can also be associated with a guilt complex (Scorpio ministers Billy Sunday and Billy Graham preaching against sin).
Scorpio produces excellent executives, loyal and inspiring loyalty, able to be secretive when secrecy is called for.
Both Scorpio and Aries are accident prone. Aries often sustains injuries to the head, Scorpio seems to undergo more surgery than average.
Will power is a strong feature of Aries people. They are capable of fighting off great physical pain, and even disease by strength of will.
Aries intends to be master of its own destiny. Unlike Taurus/Libra(Venus People) it does not wait for opportunity too come along, it goes after it.
Both these signs are always active, nothing lethargic about them. Aries tends to live in the present and future, Scorpio in the present and past, but both emphasise the NOW.
A characteristic difference between Aries and Scorpio is that Scorpio cannot hide its feelings, being too emotional for that. Aries can - completely - it is too proud to let others know it needs then and can always find a way of going it alone if necessary.
Aries strength comes from inside, Scorpio draws strength from others, in some cases to the extent of becoming a psychic vampire.
Aries finds it easy to break away from its heredity, Scorpio is the reverse. Aries is likely to marry into a different race or religion, Scorpio more likely to marry someone who resembles a member of their own family.