The concept of sin and what constitutes a sin can vary across different religious and philosophical beliefs.
In many religious traditions, harboring hatred or ill feelings towards someone out of jealousy or competition can be considered morally wrong and sinful. For example, in Christianity, harboring hatred and jealousy goes against the teachings of love, compassion, and forgiveness that are central to the faith.
Similarly, in other belief systems, such as Buddhism and Islam, negative emotions like hatred and jealousy are often seen as harmful to oneself and others, and they are discouraged as they lead to suffering and harm.
It's essential to recognize that harboring negative emotions towards others can have adverse effects on our well-being and relationships. It's generally encouraged to work on cultivating positive qualities like empathy, understanding, and compassion, which can lead to healthier and more harmonious interactions with others.
If you find yourself struggling with feelings of jealousy or competition, it might be helpful to talk to someone you trust, seek guidance from a religious or spiritual leader, or consider practicing mindfulness and self-reflection to better understand and manage these emotions. Ultimately, focusing on personal growth and striving for a positive mindset can contribute to a more fulfilling and peaceful life.