WAYS OF THANKING ALLAHU TA’ALA (PART II)
The question of how men should thank for the favors of
Allahu ta’ala is answered in various ways by different scholars.
According to some, the most important way of thanking Him
is to think and contemplate about His existence.
Thanks be to Allahu ta’ala, Who sends so many blessings,
First, He gave me the blessing of existence!
The Human power would fall short of tallying His blessings,
Power and all kinds of superiority belong to Him by rights.
According to others, men can thank Him by realizing that
blessings come from Him and by acknowledging this fact
through his speech.
According to some others, thanking Him could be done by
practicing His commandments and avoiding the prohibited
According to some, man should first cleanse himself and
thereby be closer to Allahu ta’ala.
According to others, man should try to give guidance
to others who are in need of finding the correct way of living. He should try to help others so that they may become correct (salih) 
According to some, there is no particular way of thanking
Him. Everyone can follow different ways of thanking Him.
According to later scholars, man’s duty toward Allahu ta’ala
can be summarized in three groups: The first one is the worship
he performs by using his body, i.e., “salat” 
and fasting; the second one is the duty he performs through his soul, i.e., having correct faith [having a belief agreeable with the
prescription taught by the Ahl as-sunnat 
scholars]; and the third
is the endeavour to get closer to Allahu ta’ala by doing justice
among human beings. This could be accomplished by being a trustworthy person and by giving advice to others and by teaching Islam to others.
We could summarize the acts of worship in three groups:
Correct belief, correct speech and correct behaviour. The
commandments which are not clearly stated in the last two
categories could be modified, depending on times and places.
Allahu ta’ala is the only authority entitled to make this change,
and He has done so through His Prophets. Human beings
cannot change acts of worship by themselves according to their
own understanding. Prophets, and the Ahl as-sunnat scholars,
who are the inheritors of the Prophets, communicated in detail
the kinds of worships and how they would be performed.
Everyone should learn these properly and practice them.
I would summarize all the aforesaid facts by saying that in a
nutshell a Muslim’s duty toward Allahu ta’ala is to hold the
correct belief, to be a trustworthy person, and to perform good
deeds (’amal-i saliha)
Islamic scholars and great guides of tasawwuf 
the most necessary thing for a human being is to have iman 
(belief), perform good deeds (’amal)
and do them with sincerity
. Happiness in this world and the next world can only be
achieved by erecting these three pillars. “ ’Amal” means acts
that can be accomplished through the spiritual heart, tongue, or
body. Acts to be accomplished through the spiritual heart are
ethics or morals. Sincerity (ikhlas) means doing all the good
deeds and worships for the sake of Allahu ta’ala and for the
purpose of obtaining His love and approval.