Which act in Islam is the best?

[bamalli]

Abdullah bin `Amr bin Al-`as (May Allah be pleased with them) reported:

A man asked the Messenger of Allah (wall allahu alaihi wa sallam): "Which act in Islam is the best?'' He (wall allahu alaihi wa sallam) replied, "To give food, and to greet everyone, whether you know or you do not.''
[Al-Bukhari and Muslim].

Feeding poor and destitute is an act of goodness and so is fulfilling the needs of the indigent. Greeting every body Asalamu alaikum whether an acquaintance or stranger, is good manner too. Both of these act's generate mutual love and remove hatred and ill will from hearts. All other forms of greetings do not substitute for our Islamic greeting.