Shirk is associating partners with Allah in worship. Asking saints or graves for help is a violation of Tawhid al-Uluhiyyah. Worship belongs solely to Allah, without intermediaries. Islam strictly guards against even subtle forms of shirk. It nullifies all deeds if committed knowingly.

Angel Jibreel عليه السلام is entrusted with delivering revelation from Allah to the prophets. He brought the Qur'an to Prophet Muhammad ﷺ. His role highlights the connection between the divine and humanity. Belief in angels is part of unseen faith (_al-ghayb_). Denying them is disbelief.

The six articles of faith are belief in Allah, His angels, His books, His messengers, the Last Day, and Divine Decree. They are derived from Qur'an and Hadith, particularly the Hadith of Jibreel. They represent the unseen realities a Muslim must affirm. Together, they form the backbone of Aqeedah.

Qadar means that everything happens by Allah's knowledge, will, and decree. Both ease and hardship are from Him, though humans are responsible for their choices. This balance protects believers from despair in hardship and arrogance in success. Rejecting Qadar is a deviation from orthodox belief.

Tawhid is the foundation of Islamic Aqeedah, affirming that Allah is One without partners. It encompasses His lordship, names, and attributes. All other beliefs flow from this central principle. Without Tawhid, other acts of worship lose their meaning. This is why shirk (associating partners with Allah) is considered the gravest sin.