Hawzah News Agency – The merciful prophet of Islam, peace be upon him and his household says:

لولا أنَّ الشَّياطينَ يَحومُونَ على‏ قُلوبِ بَني آدَمَ لَنَظَرُوا إلَى المَلَكوتِ.

'If it was not for the devils hovering around the hearts of human beings, they would be able to see the Divine Kingdom (malakut).'

Source: Bihar al-Anwar, v. 70, p. 59, no. 39