In other words it must become a meditation. The rabbis explain that one who penetrates into the workings of creation, or the depths of an idea, story, or commandment in Torah, will naturally and automatically be aroused to love of G-d. This counterbalancing of both love and fear in relation to G-d is crucial for several reasons. Personal transformation is hard work. The force of habit and the desire for comfort oppose one's efforts with a fury, for self improvement works against their interests by always demanding change and sacrifice.
Love can only go so far.
Both the animal soul and Divine Soul aspire toward unity but in proportion to their own capabilities and world views. The Divine soul seeks to dissolve itself in the Infinite Light of G-d. Its self-ness is a frustrating barrier between itself and its Beloved, like trying to pick up a penny with wool mittens. The animal soul, on the contrary, can't really see beyond the shadow of its own outline, and so its definition of oneness is likewise limited. Therefore it strives for unity through physics and the unified field theory, telecommunications, universalism, sexuality, etc.