Perhaps just an extreme way of analogizing, Catholics (unlike some of the cults) don't really believe that we become God or gods.
The RCC seems hung up on morphing this creation into God Himself when Scripture is very clear that we remain sinners until our death. Mercifully, if we have been covered by the blood of Christ, all our sins have already been forgiven on the cross (Hebrews 10.)
The unmerited gift of the Holy Spirit indwells and leads Christ's sheep by the grace of God alone. Christ's sheep do not become Christ; they are led by Christ and redeemed by Christ through the grace of His imputed righteousness.
This is a quote for St. Athanasius "On the Incarnation". Yes, more than just that quote needs to be read, and preferably the entire book. Here is the relevant chapter (see verse 3):
54. The Word Incarnate, as is the case with the Invisible God, is known to us by His works. By them we recognise His deifying mission. Let us be content to enumerate a few of them, leaving their dazzling plentitude to him who will behold.As, then, if a man should wish to see God, Who is invisible by nature and not seen at all, he may know and apprehend Him from His works: so let him who fails to see Christ with his understanding, at least apprehend Him by the works of His body, and test whether they be human works or God's works. 2. And if they be human, let him scoff; but if they are not human, but of God, let him recognise it, and not laugh at what is no matter for scoffing; but rather let him marvel that by so ordinary a means things divine have been manifested to us, and that by death immortality has reached to all, and that by the Word becoming man, the universal Providence has been known, and its Giver and Artificer the very Word of God. 3. For He was made man that we might be made God ; and He manifested Himself by a body that we might receive the idea of the unseen Father; and He endured the insolence of men that we might inherit immortality. For while He Himself was in no way injured, being impossible and incorruptible and very Word and God, men who were suffering, and for whose sakes He endured all this, He maintained and preserved in His own impassibility. 4. And, in a word, the achievements of the Saviour, resulting from His becoming man, are of such kind and number, that if one should wish to enumerate them, he may be compared to men who gaze at the expanse of the sea and wish to count its waves. For as one cannot take in the whole of the waves with his eyes, for those which are coming on baffle the sense of him that attempts it; so for him that would take in all the achievements of Christ in the body, it is impossible to take in the whole, even by reckoning them up, as those which go beyond his thought are more than those he thinks he has taken in. 5. Better is it, then, not to aim at speaking of the whole, where one cannot do justice even to a part, but, after mentioning one more, to leave the whole for you to marvel at. For all alike are marvellous, and wherever a man turns his glance, he may behold on that side the divinity of the Word, and be struck with exceeding great awe.
Sounds like you better start believing it...Your church demands it...
You'll notice there are Catholics on this thread that DO believe it...