There is still another aspect of the question...
There is still another aspect of the question, and that is the dedication and devotion involved in Imam Ali's act. Once while Imam Ali was on the chest of an enemy, he spat on the Imam's face. Imam Ali at once got off so that his act might not be affected by the motive of personal vengeance. The spirit of such a stroke is certainly superior to all acts of worship. It is this spirit which gives the acts of a true believer their proper meaning and significance.
Outwardly the acts performed by the polytheists and the monotheists, the idolaters and these who do not worship the idols, look alike. Apparently there is no difference in them. Abu Sufyan also used to offer prayers. Mu'awiyah was himself the Imam of Congregational prayers. They performed their religious acts like others. It is the spirit of prayer that accords sublimity to it. If the spirit is there, prayer is a devotional act. Otherwise it is nothing more than a mere show and a fraud.
This principle applies to us also. We simply deceive each other. Our Worship is For Paradise All our devotional acts serve our own interests only. Those who are more pious among us perform them for the sake of Paradise. Take away the temptation of Paradise, then see who performs them. Imam Ali's case is different. He was in fact fond of the acts of devotion and worship. It is said about him that he loved the acts of devotion and embraced them.
As a matter of principle it is not of much significance to perform acts of worship for the sake of Paradise. A person who has reached the stage of passing away in Allah, attaches no importance to Paradise. He actually does not care for it. Paradise and Hell are alike for him who has annihilated himself. He praises Allah because he believes that Allah deserves devotions. This position is attained by those who are fond of acts of worship.
They worship Allah because they believe that He is fit for being worshipped. There are many degrees of devotion. Anyhow, the first step is shunning the selfishness and getting out of the narrow hole of egoism. For this purpose the first thing to be done is to wake up for the sake of Allah and not to remain sleeping. At present we are asleep, although apparently awake. Our waking is that of animals, not of man. A tradition says that people are asleep; they will wake up when they will die.
At that time they will realize that they were totally unconscious of the real situation. A Qur'anic verse says: 'Hell is surrounding the unbelievers'.