It's there:b'SHEM Yah'shuaNAsbU 2 Peter 1:4 For by these He has granted to us His precious and
magnificent promises, so that by them you may become partakers
of the divine nature, having escaped the corruption that is in the world by lust.
CCC #460 refers to Theosis. The concept is not exactly new, nor particular to the Latin Rite of the Catholic Church.
I realize some folks think Christianity began in Geneva and the Bible was written by King James, but Christ started His Church 1900+ years ago, and the scholarship is a bit more thorough than some recent splinter group.