How do we raise our children with an Islamic upbringing, far from capriciousness and harshness in treatment?

To raise children with a comprehensive Islamic upbringing, we need four types of education: faith-based (connecting the child to the fundamentals of faith, the pillars of Islam, and the principles of Sharia), moral (teaching them ethical principles and virtuous conduct), physical (nurturing them to have physical strength and a healthy body), and intellectual and scientific (shaping their minds with religious sciences and contemporary cultural knowledge). These types, if the guardian excels in educating the child in them, are sufficient to produce a righteous young person. It is recommended to learn the art of education, benefit from the experiences of others, and read specialized books.