In astrology, mutual reception is when two planets are in each other's signs of rulership. Mutual Reception Two planets are in mutual reception when they are in each other's signs (for example Mercury is in Aries and Mars is in Gemini). If the condition of each planet in mutual reception is strong, they will strengthen and provide assistance to one another. Some modern astrologers believe they will also take on some of each other's attributes.
Whenever planets are in mutual reception, they provide the native with additional forces to overcome difficulties that present themselves during transits affecting their signs and houses. Ancient astrologers called this condition "exchange of signs," and it was but one example of various forms of astrological reception, that is, assistance provided by one planet for another one which falls in signs where the first planet has dignity.
However, there are conditions where this helpful relationship is much weakened:
For example, in a chart where Mercury is in Capricorn and Saturn is in Virgo, a strong mutual reception is in effect. Mercury is located in Capricorn, Saturn's domicile, or rulership, and Saturn is found in Mercury's sign of rulership and of exaltation, Virgo. The two signs are in trine to one another, and hence have a strong working relationship. In this instance, the individual with these placements would be likely to demonstrate a powerful, logical mind, with excellent ability to reason and strong habits of organization, as well as the likelihood of being a very hard-working, focused thinker. The relationship brings out the best attributes of Saturn's powers of organization and dedication and Mercury's facility of mind. Furthermore, transits affecting Mercury adversely would be mitigated by Saturn's strengths, and Saturn might be able to come to Mercury's rescue. Mercury might have the same function in the case of an adverse transit to Saturn.
If an individual has the Sun posited in Aquarius and Saturn located in Leo, both the Sun and Saturn are in mutual reception, since the Sun's own house is in Leo, where Saturn is located, and Saturn governs the sign of Aquarius, where the Sun is positioned. However, in this example, since the signs of Leo and Aquarius are opposed to one another in aspect, the mutual reception may be of little value. Located opposite their own houses, in the signs of their detriment, both planets have little dignity, and without other very strong placement factors to compensate for this, the mutuality is probably not a factor in the individual's life