The ruling on thinking about worldly matters and their worries during prayer

A person performs the prayer in the required manner, completing its pillars, obligatory acts, and recommended practices, but he is dominated by thoughts about the conditions, concerns, and problems of this world. Is his prayer valid?
Answer: The prayer is valid, but he should strive to control himself, to struggle against it, so that he gathers his heart upon his prayer, and so that those thoughts and worries concerning his worldly life cease from him. For this is a station of striving.
So the believer strives to control himself when he enters into prayer, and he strives to gather his heart upon humility before Allah and magnifying Him. Let him remember that he is standing before the face of the Great Allah, so that he becomes humble before Him (Glorified and Exalted is He), and so that he magnifies the sanctity of this station, and so that he gathers his heart upon His fear, his awe of Him, and His magnification, and upon reflecting on what he recites. Yes.
The presenter: May Allah reward you with good.