The most fundamental belief that a Muslim has is that "There is only One God," the Creator, the Sustainer -- known in the Arabic language and by Muslims as Allah. Allah is not a foreign god, nor an idol. Arabic-speaking Christians use the same word for the Almighty.
The fundamental pillar of faith in Islam is to declare that "there is no deity worthy of worship except the One True Almighty God" (in Arabic: "La ilaha ill Allah").
In the Qur'an, we read that Allah is Compassionate and Merciful. He is Kind, Loving, and Wise. He is the Creator, the Sustainer, the Healer. He is the One who Guides, the One who Protects, the One who Forgives. There are traditionally ninety-nine names, or attributes, that Muslims use to describe Allah's nature.
Islam is based on the concept of Tawhid, or Unity of God. Muslims are strictly monotheistic, and fiercely reject any attempt to make God visible or human. Islam rejects any form of idol worship, even if its intention is to get "closer" to God, and rejects the Trinity or any attempt to make God human.
In Muslim understanding, God is beyond our sight and understanding, yet at the same time "nearer to us than our jugular vein" (Qur'an 50:16). Muslims pray directly to God, with no intermediary, and seek guidance from Him alone, because "...Allah knows well the secrets of your hearts" (Qur'an 5:7).
