The Heidelberg Catechismhttps://learn.ligonier.org/articles/the-heidelberg-catechism 4. What is God?God is a Spirit, infinite, eternal, and unchangeable, in His being, wisdom, power, holiness, justice, goodness, and truth.
5. Are there more Gods than one?There is but one only, the living and true God.
6. How many persons are there in the Godhead?There are three persons in the Godhead; the Father, the Son, and the Holy Ghost; and these three are one God, the same in substance, equal in power and glory.
42. What is the sum of the Ten Commandments?The sum of the Ten Commandments is to love the Lord our God with all our heart, with all our soul, with all our strength, and with all our mind; and our neighbor as ourselves.
95. To whom is baptism to be administered?Baptism is not to be administered to any that are out of the visible church, till they profess their faith in Christ, and obedience to Him; but the infants of such as are members of the visible church are to be baptized.