(The Obligation of Obedience to the Messenger of Allah (peace and blessings be upon him)) And his Messenger is the one to be obeyed, and his word is the accepted one, for he is the possessor of the proof, and his command is binding, with no

The Shaykh :"And his Messenger is the one to be obeyed, and his word is the accepted one, for he is the possessor of the proof"
That is, the possessor of the evidence. So the word of the Messenger (peace and blessings be upon him) is to be obeyed, and his command is to be obeyed.
"And his command is binding, with no choice in it for one of intellect and one of faith"
The command of the Messenger is binding; it is a binding obligation that we must accept. We must accept it. Either we are obligated to act upon it if it is obligatory, or it is recommended for us to act upon it if it is voluntary. However, accepting it and that it is prescribed is obligatory. And his statement (may Allah have mercy on him): "with no choice in it" is due to the saying of Allah the Exalted: So there is no choice for a believer in the command of Allah and His Messenger.