Sheikh Ibrahim El-Shafie has started a series of lessons explaining "The Personal Obligatory Knowledge" regarding matters of belief in Allah, His Angels, His Books, His Messengers, the Day of Judgment, Destiny, Purification, Prayer, Fasting, Zakah, Hajj upon the able, the sins of the body and the like.
In this lecture, the sheikh states that the author of the book addresses the matter of the meaning of the two testifications of faith (Shahadah), which means "I testify that No one is God except Allah and that Muhammad is the Messenger of Allah'.
YouTube - https://youtu.be/9eHSbVilWWk