{Building up} (epoikodomountes). Present active participle
of epoikodome(935c), old compound with metaphor of a house
(oikos), common in Paul ( 1Co 3:9-17  Col 2:7  Eph 2:20 ). {On
your most holy faith} (	(8869) hagi(9374)at(8869) hum(936e) pistei). For the
spiritual temple see also  1Pe 2:3-5 . See pistis (faith) in
this sense (cf.  Heb 11:1 ) in  2Pe 1:5  with the list of graces
added. A true superlative here hagi(9374)at(8869), not elative.
{Praying in the Holy Spirit} (en pneumati hagi(9369)
proseuchomenoi). This is the way to build themselves up on their
faith.