Triune God
The Bible and Lutherans teach that there is only one true God. This God is invisible, holy, eternal, and has all power and wisdom. In the Bible God reveals himself as three persons - Father, Son, and Holy Spirit. This is why he is called Triune. These three persons in one God are all God. They are equal in power, glory and in every other quality. To deny or ignore one person is to deny all of them. It is God who created, redeemed and sanctified us.
Deuteronomy 6:4 Hear, O Israel: The Lord our God, the Lord is one.
Matthew 28:19 Go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit.
John 5:23 He who does not honor the Son does not honor the Father, who sent him.
Genesis 1:1 In the beginning God created the heavens and the earth.
1 John 2:2 He [Jesus] is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world.
Romans 15:13 May the God of hope fill you with all joy and peace as you trust in him, so that you may overflow with hope by the power of the Holy Spirit.