17 Thou shalt not hate thy brother in thine heart: thou shalt in any wise rebuke thy neighbour, and not suffer sin upon him.
18 Thou shalt not avenge, nor bear any grudge against the children of thy people, but thou shalt love thy neighbour as thyself: I am the Lord.
Today’s two commandments are very interesting. While all the previous ones have been prohibitions against what you do, today’s venture into prohibitions as to what you permit yourself to feel. “Thou shalt not hate thy brother in thine heart” and “thou shalt love thy neighbor as thyself” can be very difficult commandments to follow, as they require an emotional state that we may not naturally feel.
In my own experience I have learned that while the presence of hate and the absence of love might be my natural state towards any individual in particular, it is possible to change them over time. By not dwelling on the hate when it arises, it does eventually go away. By seeking to do kind acts even in the absence of love, eventually the love returns. Thus, I do not believe that we are condemned by being amiss in these things in a single moment, but only if we will not train our hearts to love and be kind with the time that we have.
It is also interesting to note how these two laws in the Old Testament point to the higher law that would come later. I think we do not often remember that when Jesus said that the second greatest commandment was to “thou shalt love thy neighbour as thyself,” (Mark 12:31) he was not presenting a new idea, he was quoting himself as Jehovah in today’s verses. And he was also quoting the Old Testament for what he gave as the first great commandment, to love God with all our hearts. (see Mark 12:30 and Deuteronomy 6:5).

