Fours represent stability, structure, order and practical attainment.

Four of Wands - rites, inspiration, freedom, ceremony, harmony, peace, perfected work. Four of Cups - Boredom, apathy, discontent, dissatisfaction, withdrawal, meditation, luxury
Four of Swords - regrouping, introspection, illness, time out, rest
Four of Pentacles - holding on to ones possessions, thrift, a reluctance to let go, insecurity, selfishness, earthly power