Hawzah News Agency – The commander of the faithful, Imam Ali peace be upon him says:

ما أقبَحَ بالإنسانِ‏ ظاهِراً مُوافِقاً، وباطِناً مُنافِقاً.

'How hideous is the human being whose outer is agreeable while his inner is hypocritical.'

Source: Ghurar al-Hikam, no. 9559