Below is a brief answer to a rather involved question. For a more thorough exploration of United Methodist beliefs we recommend:
John Wesley (1703-1791), the first teacher of “Methodism”, described a methodist as
...one who loves the Lord his God with all his heart, with all his soul, with all his mind, and with all his strength.
United Methodists believe in one true God - Father, Son and Holy Spirit.
SCRIPTURE, TRADITION, EXPERIENCE and REASON are the theological guidelines for what United Methodists believe.
Reconciliation Through Christ—“The offering Christ freely made on the cross is the perfect and sufficient sacrifice for the sins of the whole world, redeeming man from all sin, so that no other satisfaction is required.”†
The Sacraments—Baptism and The Lord's Supper are the two Sacraments ordained by Christ. We believe that these Sacraments “are symbols and pledges of the Christian's profession and of God's love toward us.”†
†From The Book of Discipline of The United Methodist Church - 2012. Copyright 2012 by The United Methodist Publishing House. Used by permission.