In the beginning of Hayei Sarah, we are told that Sarah dies and is buried. Later, Abraham sends his servant, Eliezer, to find a wife for Isaac. When Isaac and Rebecca meet, they fall in love, and we are told that Isaac is consoled; that is, he starts to feel better even though his mother died.
Rashi writes that when Sarah died, Abraham and Isaac lost more than a wife and a mother; they lost three mysterious and mystical events. When Rebecca arrived, and love once more came to the household, the three events returned: The Friday night candles stayed lit until the next Friday, the challah stayed fresh for the whole week and a cloud of glory descended back down upon Sarah's tent. This is what love does. If you love your family and friends, light, nourishment and heavenly hugs will always surround you.