All praise is due to Allah alone and may peace and blessings be upon the Noblest of the messengers, our Prophet Muhammad, his family, his Companions, Tabi`un (Followers, the generation after the Companions of the Prophet) and those who followed them in the best manner until the Day of Resurrection.
I have read the article written by our brother in Islam, the eminent Shaykh `Umar ibn Ahmad Al-Millibary on the meaning of 'La ilaha illa Allah'. I read the explanation of the shaykh thoroughly on the three points of view regarding its meaning. The definitions are as follows:
First, it means that there is no deity truly worthy of worship except Allah.
Second, that there is no deity truly worthy of obedience except Allah.
Third, that there is no god but Allah.
You (Alone) we worship, and You (Alone) we ask for help (for each and everything).
And your Lord has decreed that you worship none but Him.
And I (Allâh) created not the jinn and mankind except that they should worship Me (Alone).
O my people, say 'La ilaha illa Allah', to succeed.
And they (Arab pagans) wonder that a warner (Prophet Muhammad ﺻﻠﻰ ﺍﷲ ﻋﻠﻴﻪ ﻭﺳﻠﻢ) has come to them from among themselves. And the disbelievers say: "This (Prophet Muhammad ﺻﻠﻰ ﺍﷲ ﻋﻠﻴﻪ ﻭﺳﻠﻢ) is a sorcerer, a liar. "Has he made the âlihah (gods) (all) into One Ilâh (God Allâh). Verily, this is a curious thing!"