The alignment system for a single character ranges from -99 (pure Chaos) to 99 (pure Lawful), with 0 being pure Neutral. A new Lawful character starts with 9 alignment points. A new Chaotic character starts at -9 alignment points. A new Neutral character starts at 0 alignment points and continues to be considered as such until getting to 9 or -9 alignment points. Perform the indicated tasks to shift your alignment towards pure Chaos or Lawful.

Pray at the temple matching your alignment: Move 1 point towards your pure alignment.
Pray at the temple opposing your alignment: Move 2 points away from your pure alignment.
Gain a level as a priest of an alignment: Move 4 points towards your pure alignment.
Use a Level 3 or 4 Divine Spell in combat: Move 1 point away from your pure alignment.
Use a Level 8 Divine Spell in Combat: Move 3 points away from your pure alignment.