Shir HaShirim, (Song of Songs), is one of the five megilot (scrolls) in the Tanach. It is a poetic allegory of the love between Hashem and klal Yisrael. It is recited on Pesach, the holiday that celebrates the birth of the Jewish nation.
According to the Rambam, the highest form of relationship between a Jew and Hashem is a relationship based on love, ahavat Hashem. The Rambam adds, "Just as when a man loves a particular woman, he cannot forget her from his thoughts, so should a person love...(more