This combination of fire with earth can be stressful, especially since Aries' ruling planet Mars is impetuous, impatient and fiery and Capricorn's ruler, Saturn, is cautious, sombre, slow and deliberate. Capricorn likes to plan ahead and can play a waiting game. Aries acts immediately and hates to wait. Unless both people are willing to exercise tolerance, their extremely different viewpoints can bring tension or even bitterness. Capricorn often unwittingly squashes Aries.