Judaism does have their
613 commandments divided into
248 positive and
365 negative.
Number 7: To Love God, specifically Deut 6:5
Love the Lord your God with all your heart, with all your soul, and with all your strength.
and
the
Golden Rule or
You shall love your neighbor as yourself. (Mark 12:31) were already a part of Jewish teachings.
IMO Jesus was trying, as jar stated, to get people back to the basic purpose of the rules.
"The average man does not know what to do with this life, yet wants another one which lasts forever." --Anatole France