Variantly: "And you shall love the L-rd your G-d": Cause Him to be beloved by all men, as our father Abraham (did), viz. (Bereshith 12:5) "and the souls that they (Abraham and Sarah) had made in Charan." Now if all of mankind were gathered together to make a mosquito, they could not do so. How, then, is the above to be understood? Abraham converted them (from idol worship) and brought them under the wings of the Shechinah.
"with all your heart": with both of your inclinations, the good and the evil.