In reality, the notions of good and evil are defined in relation to Krishna, God, the Supreme Person, for the Sovereign Lord is the Absolute Existence, the Absolute Abode, the Absolute Truth, the Absolute Life, and as such we must understand that the entire cosmic universe dwelling in Him, as well as all spiritual souls, He is the One beneficiary of all the fruits of the acts performed by all beings.
Because of his supreme, infinite and absolute position, Lord Krishna is in fact the owner of all that exists, and the sole beneficiary of all the fruits from all the works of souls that reside both in the spiritual world, and those incarnated in the material universe.
Because of this truth, it is easy to understand that the true notion of good and evil is defined in relation to Krishna, God, the Supreme Sovereign Person, for He is its pure essence and the only reality.
The Supreme Lord proves it with this word: “There is really nothing that exists outside of Me, that is what you must clearly understand”.
It is the effects of our thoughts, words and actions that cause the perpetuation of reincarnation.
Lord Krishna says: “It is the thoughts and memories of the being at the moment he leaves his body that determine his future condition.”
If Jesus disseminated a teaching based on beneficence, it was essentially to prevent his disciples and apostles from having thoughts, words and actions rooted in malfeasance, because they would have obliged them to reincarnate repeatedly, and to have each time an existence filled with various sufferings.
This is why he said: “love one another”.
At the end of his magisterium he said to them: “I still have many things to tell you, but you cannot understand them now. When the Comforter has come, the Spirit of truth, he will guide you into all truth, for he will not speak of himself, but will speak all that he has heard (spoken by the Father), and he will announce to you the things to come.”