O You servants of Mine who have attained belief! Behold, vast is My earth; serve Me then, Me alone! (Live by Divine Values and work for the establishment of the Divine System wherever you may live)
O my servants who believe! Indeed, my earth is spacious! (The capacity of your brain is expansive! Note that while the body and the brain, in terms of their material make-up, are denoted by the word ‘earth’, the functions of the brain, its neuronal activities and its manifestation of data, are referred to as ‘heavens.’ The reason why ‘heavens’ is used in the plural form, according to my understanding, is due to the various levels of manifested data and knowledge. Hence, by saying ‘My earth is spacious,’ there is an indication as to the vastness of the capacity of the brain and a proposal to use it as its highest level of performance in order to attain knowledge. For, the main concern is not in regards to objects that are to deteriorate under the earth but to the necessary acquisitions pertaining to an eternal life.) Serve only Me!
Sayyed Abbas Sadr-Ameli
O� My servants who believe! Verily My earth is vast, therefore, Me alone should you worship
Al-muntakhab fi tafsir al-Qur'an al-Karim
O you My worshippers who conformed your will to My will: "My earth is, vast indeed -therefore you have no excuse-, worship Me and Me alone."