What is the way to improve one's good opinion of Allah and reliance upon Him, and how can one deal with a domineering sister who interferes in life matters and frequently curses and quarrels? Is it permissible to distance oneself from her, offering only greetings of peace? And what if she tries to sow discord between the questioner and her mother?

The sister should be boycotted if she causes harm in religious or worldly matters, while maintaining peace between you as a form of connection. One of the wise individuals can mediate to convince the mother of the sister's injustice. It is important to rely on Allah and have a good opinion of Him, as this strengthens one's character and brings assistance. You can also refer to the consultation section of the website regarding low self-confidence.