The aggregate of forms (Skt. rūpa; Tib. གཟུགས་, zuk, Wyl. rigpawiki gzugs) is the first of the five aggregates. It is not only our physical bodies but also includes our relationship with our environment through the medium of our bodies and senses.
Forms can be divided into causal and resultant forms, and furthermore into fifteen:
- 1-4: the four causal forms, which are the four elements of earth, water, fire and wind.
- 5-9: the five sense objects of visual form, sound, smell, taste and texture.
- 10-14: the five sense faculties of eye, ear, nose, tongue and body.
- 15: the imperceptible form. This can further be subdivided into five: form of particles, spatial form, form resulting from a fully taken promise, imagined form and mastered form.
Forms 5-15 are said to be resultant forms.