Longer Catechism (Orthodox) 22.391

Chapter 22 — Part II — On Hope (Introduction and Prayer)

Section 391. Q. What should the Christian do when he lifts up his mind and heart to God? A. First, he should glorify him for his divine perfections; secondly, give thanks to him for his mercies; thirdly, ask him for what he needs. So there are three chief forms of prayer: Praise, Thanksgiving, and Petition.