No, we don't do that "in order" to become Christ-like; the faith converts our hearts. We grow in Chirst. We seek God to lead us, we willingly ask of Him to grant us the grace; we do so through prayer. God, in turn, gives us opportunities to put what we believe in practice.
I thought theosis was achieved by becoming Christ-like to a certain degree. How is this accomplished if not through acts or deeds? Are not deeds necessary to achieve theosis?
Theosis is achieved by becoming Christ-like, through faith, not through amibition.