Using the seasonal qualities accounts for the differences in expression between signs of the same element. All the fire signs are by their nature hot and dry. However, the addition of the elemental qualities of the seasons results in differences between the fire signs. Aries being a Spring sign is wet (hot & dry, hot & wet), Leo being the midsummer sign gets a double dose of hot and dry and is the pure fire sign, and Sagittarius being an Autumnal sign is colder (hot & dry, cold & dry).