What state of mind or emotion a man should be always in according to Quran or hadees of ahle bait( as) because we cannot always be happy, sad or angry. So have Quran or our imams have said something about this? What emotion or state of mind we always try to be in?

According to Hadith of Ahlulbayt (a), a believe is sad in their hearts but always smiling. The reason is the yearning towards God and the desire to always do better but in terms of how we deal with people, it should always be pleasant and as much as possible hopeful and helpful to others.