The two greatest commandments by the Lord and by these it is enough:

The Lord our God is one Lord:
And thou shalt love the Lord thy God;
With all thy Heart
With all thy Soul
With all thy Mind
With all thy Strength
And thou shalt love thy neighbour as thyself.
Find it in Mk 11:30, Mt 22:37, Lk 10:27, Dt 6:5

There is no other greater commandment than these two; All the other law is under these two great commandments; So choose to live by these and you shall be blessed till heaven, and by these we must fulfill and dwell, in order to inherit eternal life, so then their should not be all those killings, hatred, envy, and other evil doings, must be forsaken to remain in brotherly love and the Love of God, follow the links on right to read on what love is.