Shaykh Dr. Yasir Qadhi delves into the way to trust in Allah's wisdom in giving some and depriving others of wealth, children and sustenance and also elaborates on where our true contentment and happiness lies.
Allah gives His sustenance to those whom He loves just enough so that they don't go beyond the bounds. If Allah were to give us everything then we may go beyond that which is permissible for us and fall into sin.
Qadr is used to find peace in whatever has happened in your life. For more such amazing facts and observations by the Shaykh on the value of finding contentment in the Qadr of Allah, do listen intently.