DEUT546 Even someone who has reached the highest levels of closeness with God is obligated to think about the welfare of his fellow man. The Torah tells us that even someone who observes all the commandments and has attained the attribute of loving God, must emulate God ("to walk in all His ways") in order to cleave to Him. Emulating God means being compassionate and bestowing kindness on others (see Rashi). One might think that a person who loves God need only devote himself to prayer and Torah study and by this means he will cleave to God. We see from this verse, however, that an essential ingredient in cleaving to God is caring about our fellow man. (Introduction to Ahavas Chesed).