Your character will have different types of attributes. Here are the three most important ones:
Basic Attributes contains your Name, the Name of your Deva, Race, Sex, etc. Most of these attributes are permanent or at least won’t change very often.
Primary Attributes are attributes such as Strength, Dexterity, Intelligence, etc. These are the attributes that define the core of your character and gives you the possibility to train certain skills, and limits to what extent you can train others. You start the game with a certain amount of points that you distribute on the different attributes, and when playing the game you will slowly improve the attributes by using skills. Also, improving an attribute will give every skill based on that attribute a small boost. However, the Primary Attributes have a "cap", meaning once you have reached a certain number of points in all your attributes, you cannot increase them anymore, at least not in the usual way. To increase your Strength for example, you’ll have to obtain those points by decreasing another attribute of your choice. This means that you can never max out on all Primary Attributes, rather you’ll have to choose what will be the strengths and weaknesses of your character.
To sum it up:
1. A Primary Attribute increase when using a Skill connected to the particular attribute
2. Primary Attributes have a common cap
Secondary Attributes are attributes that are calculated from other attributes, like Health, Mana, Stamina, Movement, etc. Skills may also affect these attributes.