A few means I know to “see God” in the body (these are not the direct beatific vision but come very close as we can while living, as “no one can see My Face and still live”):
- Adoration of the Eucharist
- Witnessing uncreated light (monastic hesychasm thing)
- reaching the final grade of mental prayer (transforming union here, this type of prayer we are all called to, do mental prayer daily as per St. Alphonsus Ligouri or the book “The Ways of Mental Prayer” and you will reach it)
- special revelations from God (possibly rarest of all these things, theophanies and apparitions, stuff like that)
These are the heights we can go to in the body. If you purify your heart by following the moral teachings of the Church, doing good works, and praying A LOT (with the most important thing: CONSISTENCY) you will get to the heights. How long you take depends on how much you want to keep disobeying God and going back and forth between God’s Law and the world’s custom. Get a spiritual director too, they can help make it faster in obeying them (exercises humility, and St. John of the Cross says to be taken with love for a soul God does not look on the greatness of it’s works but of it’s humility).