Al Hamd-u-Lilah-e-Rabb-il-Aalamiin (Verse 02, Surah Fatihah)

الْحَمْدُ للّهِ رَبِّ الْعَالَمِينَ

All praise is due to Allah, the Lord of the Worlds.

AL HAMDU

Hamd (The Praise) is Allah's. It has no beginning and no end.

We, the created beings, do our best, within our limitations, to give expression to the "real praise" (hamd). His hamd, as His grace, is unlimited and continuous. No one can praise the merciful even for a whole life-time and say that justice has been done, because every time one gives thanks to Allah he inhales and also exhales, drawing in the good life-giving air and exhaling the bad air, two bounties he is receiving for which only once can he say "I thank the bountiful Lord". It is impossible to thank Allah for the innumerable bounties He has put at the disposal of man, right inside his body, and in the world where he lives as an individual as well as a member of the community. Even the thanks and praises he offers to the bountiful have been taught to him by the Lord of the worlds. Therefore, every creature is, all the time under the obligation of the bountiful grace of Allah.

By praising, we reach the stage where the infinite goodness of our Lord purges out of us the taste for evil and creates in us the eagerness to get nearer and nearer to Him to earn His mercy which purifies us and reflects in us the divine attributes.

RABBUL ALAMIN

By making Allah known as the rabbul alamin, Islam has disclosed the truth to mankind that He is the Lord of everything in the universe, be that human, animal, vegetable, mineral, perceptible or imperceptible, visible or invisible, near or far, in the earth or in the heavens, or in between them. With infinite power, able to do all things, the all-wise almighty creator of matter and meaning is a supreme sovereign in every aspect of His absolute authority. His independent will extends to and covers all kinds of the worlds created by Him.
The five "mystic" classifications of the worlds are as under:

1. Material or physical NASUT

2. Metaphysical or supernatural MALAKUT

3. Spiritual JABARUT

4. Divine LAHUT

5. Imperceptible and unknowable GHAYBUL GHAYUB

By introducing Allah as the rabbul alamin, Islam has warned and alerted mankind not to do injustice to any creation of Allah. He will punish the unjust offender because even the smallest degree of injustice displeases the just Lord of the worlds. Also, this term makes man realise that Allah is the master not only of mankind or animate and visible objects but He is the Lord of everything in the universe - human or animal, vegetable or mineral, visible or invisible, perceptible or imperceptible, near or far.