If you have concerns about Islamic teachings, it's best to consult with a knowledgeable Islamic scholar or a qualified religious authority to get a more specific and accurate answer based on your personal situation.
In Islam, the permissibility of keeping a diary would generally depend on the content and the intentions behind it. Writing a diary to express your thoughts, emotions, and struggles as a way to cope with depression can be considered a form of self-reflection and self-improvement, which may be seen as positive.
However, it is essential to remember that Islam places great emphasis on maintaining good moral character and avoiding offensive language or harmful thoughts. If your diary contains offensive words or harmful thoughts towards others or even towards yourself, it may not align with Islamic values.
It is encouraged in Islam to seek help and support from others when dealing with emotional or mental struggles. If you find yourself battling depression, consider reaching out to a trustworthy friend, family member, or a mental health professional who can provide a supportive and non-judgmental environment to discuss your feelings and emotions.
In summary, while keeping a diary as a form of self-expression and self-reflection may not be inherently prohibited in Islam, it is essential to ensure that the content remains respectful and does not promote negative or harmful attitudes. Seek guidance from knowledgeable sources if you are unsure about specific religious rulings pertaining to your situation.