I don't think there is a point where we stop or reach an end goal post like enlightenment, nirvana or moksha, etc. The spiritual growth is like the expansion of this universe. It's been going on from the time of creation (or start of bigbang) and it will continue. The same is the case for jivas or individuals also. All of us are expanding to various levels each day and all the time. Even if we expand to become everything there is, that 'everything there' is ever growing and we grow with it.
Perhaps until the time we dissolve into the Emptiness or Dao. Like the universe shrinking into what it was before bigbang. Then, another explosion and expansion, and so on....