The Church is the community of believers who are on their (Pilgrimage, Journey, devotion)
to heaven​

Pilgrimage.

Explanation:

A pilgrimage can be defined as a religious journey embarked upon by a person towards a holy place such as heaven.

Basically, the life of a Christian is considered to be a pilgrimage because it is typically a journey from being a slave to sin to a place of salvation, which the destination is a heavenly place. Thus, a Christian trying to reach this eternal promise land (Canaan) known as heaven is usually faced with numerous challenges or difficulties and as such he or she may derail (stumble) if not focused and determined.

Hence, the Church is the community of believers who are on their pilgrimage to heaven.