The Ways of the Righteous Project -
Gate of Hate

1. Do not hate your brother in your heart
   VaYikra 19:17
   
2. The trait of hatred leads to many transgressions such as slander, rejoicing in another's misfortune, taking revenge and bearing grudges
   Orchot Tzadikim: Shaar HaSinah
   
3. One might hate his fellow for causing him financial loss, for striking or shaming him, for giving him a bad name, or similar. However, one must not hate in silence. Rather, it is a Mitzvah to inform him and ask "Why did you do such and such to me?"
   VaYikra 19:17
   
4. If a person sincerely asks for forgiveness, he should be forgiven. The one who forgives must not be hard-hearted
   Bava Kama 92a
   
5. If the offender does not ask to be forgiven, he should not be hated but handled with love, so that in the end the injury will be righted
   Orchot Tzadikim: Shaar HaSinah
   
6. An extremely bad form of hatred is baseless hatred, the type that destroyed the Second Temple
   Yoma 9b
   
7. It is the way of the world for one tradesman to hate his competitor. This is very bad, because one must keep in mind that nobody can earn more than what God has decreed for him
   Midrash Tanchuma, Tazria 9
   
8. Who is the greatest? One who can turn an enemy into a friend
   Avot d'Rabbi Natan 23
   
9. One must hate every manner of falsehood. The more he hates the ways of falsehood, the more he will love Torah
   Psalms 119:163
   

Each of the following gates contains roughly 20
short teachings on that topic