I just have a question regarding the truth body and the form body.
Do these two bodies in any way relate to conventional/ultimate reality or conventional/ultimate Bodhicitta?
Whereas the form body relates to conventional reality and is the result of conventional Bodhicitta and the truth Body relates to ultimate reality and is the result of wisdom or ultimate Bodhicitta?
Thank you in advance for deepening my understanding.
My understanding of the bodies is mostly from a Gelugpa perspective. I am no expert on the subject, but this is what I do know.
It is true that the bodies are basically one (in several respects), but conventionally they may be distinguished. The bodies relate to the conventional and the ultimate in two ways.
First, the Buddhist practitioner must gain the "two accumulations" or "two collections" (tshogs gnyis
) by practicing the paramitas in order to obtain the two bodies. It is the accumulation of merit that ultimately yields the rupakaya and the accumulation of the wisdom that perceives shunyata, that ultimately yields the dharmakaya. Thus, ultimate bodhicitta, perceiving ultimate truth, is the true source of the dharmakaya, whereas conventional bodhicitta, the resolve to become a buddha for the sake of all beings, is a basis of the rupakaya, although it aims at the attainment of both bodies, as narraboth mentions above.
Second, just as the rupakaya may be subdivided into the sambhogakaya and the nirmanakya, so the dharmakaya may be subdivided into the jnanakaya and the svabhavikakaya. The jnanakaya is a buddha's omniscient, nondual awareness. The svabhavikakaya has two aspects: the absence of inherent existence (shunyata) of a buddha's omniscient, nondual mindstream and the absence of moral and cognitive obscurations in a buddha's mindstream. Viewed in the former aspect (shunyata), the dharmakaya is
ultimate truth, and the rupakaya are conventional truths.
This is how the bodies are sometimes presented in relation to conventional and ultimate.