Updated: Oct 8, 2020
The Shaytan loves when the servant feels hopeless and depressed. He tries his best to temp mankind into faults and sins and then presses them with guilt and lies. He tries to make the servant feel as if they are shut out from Allah's Mercy due to these faults and sins.
Constant attacks of this nature brings about depression anxiety, distress, worry, negative mental chatter, low self esteem/worth, hopelessness, carelessness, apathy and ultimately shirk (disbelief) if one follows this path till the end.
The servant need not to worry as Allah is always there ready to accept true repentance. As Allah عَزَّ وَ جَلَّ says in The Qur'an;
قُلْ يَا عِبَادِيَ الَّذِينَ أَسْرَفُوا عَلَىٰ أَنفُسِهِمْ لَا تَقْنَطُوا مِن رَّحْمَةِ اللَّهِ ۚ
إِنَّ اللَّهَ يَغْفِرُ الذُّنُوبَ جَمِيعًا ۚ إِنَّهُ هُوَ الْغَفُورُ الرَّحِيمُ
"Say, "O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah . Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful."
Surah Al Zumar, 39:53
According to The World Health Organization, depression affects over 264 million people worldwide.
The market for anti-depressants and anti-anxiety medication is at an all time high. With many people turning to all natural ways to treat anxiety and depression sedative herbs such as Chamomile, Lavender, Valerian, St. John's Wort, are in high demand.
While these herbs hold immense benefit Alhamdullilah they are not the only (or best) remedies. In my experience the best and fastest remedy for treating these ailments comes can be found in reciting The Qur'an and pondering over it's meanings.
Allah عَزَّ وَ جَلَّ says in The Qur'an;
الَّذِينَ آمَنُوا وَتَطْمَئِنُّ قُلُوبُهُم بِذِكْرِ اللَّهِ ۗ أَلَا بِذِكْرِ اللَّهِ تَطْمَئِنُّ الْقُلُوبُ
"Those who believed (in the Oneness of Allah -Islamic Monotheism), and whose hearts find rest in the remembrance of Allah: verily, in the remembrance of Allah do hearts find rest."
Surah Al Ra'd, 13.28
May Allah Grant you Shifah. Ameen.