Narrated Abu As-Sawar Al-Adawi: ‘Imran bin Husain said, “The Prophet (SAW) said, ‘Haya’ does not bring anything except good.” [Bukhari :: Book 8 :: Volume 73 :: Hadith 138]
This term “Haya” covers a large number of concepts, which are to be taken together; amongst them are shyness, self-respect, modesty, bashfulness, punctiliousness and scruple, etc.
Narrated Abu Huraira: The Prophet (SAW) said, “Faith (Belief) consists of more than sixty branches (i.e. parts). And Haya is a part of faith.”[ Bukhari :: Book 1 :: Volume 2 :: Hadith 8]
Narrated ‘Abdullah bin ‘Umar: The Prophet (SAW) passed by a man who was admonishing his brother regarding Haya and was saying, “You are very shy, and I am afraid that might harm you.” On that, Allah’s Apostle (SAW) said, “Leave him, for Haya is (a part) of Faith.” [Bukhari :: Book 8 :: Volume 73 :: Hadith 139]
The exact opposite or antonym of ‘haya’ is ‘fahishah’ which means shamelessness, promiscuity, and brazenness. The height of shamelessness is to commit shameful or sinful act openly, exhort it through any medium, circulate it, or to reveal it.
Allah (SWT) Say’s: “Verily, those who like that Fahishah should be circulated among those who believe, they will have a painful torment in this world and in hereafter.” [Surah Noor, Chp 24: verse 19]
Allah (SWT) also Say’s: “Allah does not like that evil should be uttered in public except by him who has been wronged.” [Soorah an-Nisa, chp 4: verse 148]
The Messenger of Allah (SAW) said: “My entire nation is safe, except those who boast of their sins. Among them is a man who commits an (evil) act, and wakes up in the morning while Allah has kept his (sin) a secret, he says: “O friend, Last night I did this and that.” He goes to sleep while Allah has kept his (sin) a secret but he wakes up in the morning and uncovers what Allah has kept a secret!” [Saheeh al-Bukhari]
From among the teachings of Allah’s Messenger (SAW) is to keep sins a secret matter. If someone commits a sinful act which is against the Commandments of Allah, then he should keep it a secret and seek forgiveness from Allah.
Abu Huraira (RA) reported: The Messenger of Allah (SAW) used to say while prostrating himself: “O Lord, forgive me all my sins, small and great, first and last, open and secret.” [Muslim :: Book 4 : Hadith 980]
Abu Sayeed al-Khudri (RA) reported that Allah’s Messenger (SAW) said: The most wicked among the people in the eye of Allah on the Day of judgment is the men who goes to his wife and she comes to him, and then he divulges her secret to the people. [Muslim :: Book 8 : Hadith 3369]