Knowing that when the Prophet ( ﷺ) went through his year of sadness (depression), Allah didn't bring down a surah to tell him that his iman was low, he wasn't praying enough, or that Allah hates him. Instead, Allah tells him to look at the sun and the sky, He tells him that He hasn't abandoned him.He reassured Him that the Akhira is better than the Dunya and that Allah will give him so much that He will be pleased. If words could feel like a hug, it would be (Surah Ad-duha)