Imam ‘Ali Ibn Husayn (a.s.) said:
اَلا وَ إِنَّ أَبْغَضُ النّاسِ اِلَى اللّهِ مَنْ يَقْتَدىِ بِسُنَّةِ اِمام وَ لايَقْتَدىِ بِاَعْمالِهِ
The most hated people before God are those who have accepted leadership of an Imam but do not follow his actions.1
One of the major faults of man is non conformity of his belief and actions. He says he believes in something, but no trace of that belief is observed in his actions.
He believes in God, but he does not practice the discipline required in his daily life to make his deeds consistent with that belief. He believes in the great court of God, but has not prepared himself to face it.
He believes in Prophet Muhammad (peace be upon him and his progeny) as the greatest Prophet and Imam ‘Ali (a.s.) as the highest leader, but he does not demonstrate any similarity with them by his actions. In short, his belief points in one direction, and his action in another.