Shaykh Abdur-Rahmaan ibn Naasir as-Sa`dee said:

"This is the sole reason that Allaah created the jinn and mankind, and the reason that Allah sent the prophets in order to call and preach their people to. It is the worship of Allaah which necessitates knowing and loving Him, as well as repenting and turning to Allaah in servitude."

Ref: The sole reason Allaah created Man and Jinn

Shaykh Saalih as-Suhaymee said:

"After looking at the website "Madeenah.com", which is supervised by the esteemed Shaykh Khalid ibn Qasim ar-Raddadee (may Allah preserve him) and administrated by a group of Islamic University of Madeenah graduates from the West, I have found it to be a valuable, beneficial, salafi website which focuses on the translation and dissemination of statements and fatwas by the Imams of Ahlus Sunnah and Salafi Mashaayikh. It aims to clarify the correct methodology while avoiding extremism, useless gossip, and distortion of the scholars' statements to make them mean what they did not intend."

Ref: Shaykh Saalih as-Suhaymee's Recommendation for Madeenah.com