Caeliar evolved past the need for sleep, and spend their entire lives in search of artistic and scientific gains, including the Great Work.
The Caeliar have no need for farming, agriculture, animal husbandry, or economics, due to their needs being met via manipulation of catoms. Additionally, the Caeliar have a great respect for all life, and will seek to not be the cause of loss of life; this philosophy goes so far as to not eat meat or eggs or allow their guests to do so. Due to this, they will not euthanize living beings, but are willing to apply pain suppression techniques to allow the being to die peacefully.
The Caeliar species lives in absolute seclusion, masking their power signatures and obstructing scans of their world, remaining beyond detection and interaction with other species. If they are ever discovered, they merely shift the beings through space-time to a distant area. Caeliar seek to preserve and protect sentient life at all costs, including at the sacrifice of their own lives.
Caeliar also seek to protect the natural flow of the universe's time line; although they possess the methodology to travel through time, they do not utilize it except in extreme circumstances and only to protect sentient life.
In 2381, the Caeliar were forced to come out of their self-imposed exile upon being confronted with the truth that they were indirectly responsible for the creation of the Borg. In order to end the threat the Borg posed to the Galaxy, the Caeliar Gestalt deposed the Borg Queen and dissolved the Borg Collective, offering the trillions of newly freed drones the opportunity to join them in their great work.
Whilst the vast majority of former drones accepted, some chose not to do so. These former drones were granted their freedom and Caeliar Catoms replaced their Borg implants, restoring their original appearances and identities.
A side effect of the transformation of Borg Nanoprobes into Caeliar Catoms was that on planets which had formerly hosted Borg Technology, when the Catoms broke down it resulted in regeneration of the planets' biospheres.