"You shall love the Lord your God"

"You shall love the Lord your God with all your heart, and with all your soul, and with all your mind, and with all your strength." (Mark 12:30, from Deuteronomy 6:5, see also Luke 10:27). 

In my reading I have come across a teaching attributed to Maimonides, that the command to love God can be acted on by meditating on the infinite love of God towards us:

I have loved you with an everlasting love. (Jeremiah 31:3)

In time, as we become more aware of God's love, our own love for God awakens. And so "You shall love the Lord your God" is not only a command, it is also a promise. Yes, that has been said of other commandments before. This, too, God will add to us.