They are active but not persistent. Fixed signs are more involved with the function of preserving and sustaining. They are predictable and reliable. Mutable signs are involved with transformation and adaptation. They symbolise the flexibility needed to allow structures to survive among changing conditions.
Mutable signs are very adaptable.
In evaluating how the quadruplicities work out in a particular situation the whole horoscope would be needed to be weighed and the planets taken into consideration. For instance, your Sun is in Aries, a cardinal sign, but you could have 6 other planets in mutable signs which would alter your personality quite remarkably. When comparing two individuals, a synastry or compatibility chart would be required. I am very happy with my purchase. Yes, very well.