Suffering\Hate\Anger\Fear\Selfishness\Conciousness
What would be the remedy of fear, and the selfishness that creates it? Knowledge. "When you can understand things, you can forgive things." - Leo Tolstoy
The first of only three maxims inscribed at the Temple of Apollo, where the Oracle of Delphi resided in Ancient Greece: "Know Thyself."
The more we understand ourselves the better we can understand everyone else; an example of how to go about this would be by asking yourself the question: "what is it exactly that leads me into behaving the way I do in any way?" And following it up with being brutally honest with yourself, then begin seeking the origins of why you become sad or angry, or desire xyz, or behave and think in any way, etc.
This is where the knowledge of what's captioned as The Golden Rule and considered the Law and the Prophets that were meant to be fulfilled comes in: “So whatever you wish that others would do to you, do also to them, for this is the Law and the Prophets." - Matt 7:12. This knowledge instills into a conscious mind an ability unique to humans: empathy, by asking the simple question: if i were them, would I want it done to me? And all its variations of asking the question, regarding any situation whatsoever. It's by imagining yourself in someones shoes specifically, and going about this in one's mind but not only for a moment, but by giving it an extended analysis, trying to gather by considering the most amount of variables while doing so; this helps an individual to best understand the behaviors of all the other individuals surrounding them, especially when contrasting it with the knowledge we've found in a deeper understanding of ourselves. And when we can understand things, we can forgive and shed the hate or fear of things.
This precept also instills a standard into a conscious mind as to how to decide what exactly is good or evil, love or hate, right or wrong, regarding any situation, any circumstance, whatsoever.
Sin (selfishness) is bred from a lack of knowledge
All hate, evil, iniquity, and selfishness to any degree can be categorized as a lack of the knowledge—an ignorance, to the true value and potential of selflessness and virtue. This is what inspired people like Jesus (in my opinion, considering the "sign" (story) of Jonah) and Socrates (debatably, the founding father of philosophy) to begin teaching strangers around their communities, because they knew that it's a knowledge that needs to be gained, thus, taught, to the point where they even gave their lives dying martyrs to their deeds and what they had to say; and the knowledge that the fear that would've otherwise have stopped them from even teaching anything at all, would be a selfishness, i.e., an evil.
This is what warrants hate, evil, and selfishness to any degree infinite forgiveness, and why it's so important to teach it the error of its ways, through love. Whether through meeting what you would consider as hate when you're met with it, with love, or exemplifying it via selfless actions. Because some people don't even have the ability to "tell their left hand from their right" (Jonah 4:11), but we can use the influence of an Earth (the influence of our peers and what a collection of people are presently sharing in—society, driving cars, holding the door open for strangers, etc.) to teach the more difficult to do so; if everyone were sharing in selflessness and virtue, wouldn't it be seen as typical as driving a car is today? Therefore, nowhere near the chore it would be seen as otherwise, considering everyone would be participating in it. And what does a cat begin to do—despite its, what we call "instinct"—when raised amongst dogs? Pant. We are what we've been surrounded with, like racists, they just don't know any better, being absent the other side of it especially. And love (selflessness) is the greatest teacher, it renders the ears and the mind of a conscious, capable being—on any planet, to be the most open-minded, thus, the most willing to truly consider foreign influences. It's this that governs the extent of one's imagination, and it's imagination that governs the extent of one's ability to imagine themselves in someone else's shoes—to empathize, thus, to love.
"We can't beat out all the hate in the world, with more hate; only love has that ability." - Martin Luther King Jr.