For the salvation of the soul and to defeat Satan, and to wait for Jesus to return, then Christianity is best. If the person wants to fix a broken world and unite all people and all religions, then the Baha'i Faith is better. But I really don't see a progression. The Baha'i Faith has to make too many things "symbolic" and not literal in the NT to make Christianity fit into the Baha'i model. And Christianity, has no need for the Baha'i Faith or any other religion except Judaism. And, ironically, Christians do to Judaism what Baha'is do to all the other religions,... they say that the Jewish leaders corrupted the true message and added traditions into the religion. But still, we don't the mysterious "original" teachings to know how and when things got corrupted.
I see the whole purpose is to know what it is to speak in the Spirit. This world is the matrix for the spiritual worlds to come. All the material world is doing, is feeding our capacity to grow in this matrix into the spiritual being we are, and will be. After Birth from this world the placenta is discarded.
The Bible tells us that we must be born again and God's Messengers show us how to be born again.
The question I ask you to consider CG is, 'why has no Messenger chosen to be an earthly king'? Christ gave the answer, His kingdom is not of this world and that is what we are invited to partake in.
The world is changing fast. The Baha'i Faith is now emerging from obscurity and this day is foretold. The fight between our lower selves and our higher selves, is now on the font line of the battlefield. We must ask, which is the stronger in us, which side will win the battle? It is our choice.
This life is a perfect place to obtain what is spiritual virtues. All that happens allows us to transcend nature and become spiritual in the knowledge and love of God. Pain and suffering are built into this matrix. As such we are born, we are educated, we earn a living to help family, community and all humanity and then we leave this matrix. All this takes sacrifice of self for the greater good.
That is the Lesson Christ has taught me, not to cling blindly to the name of Jesus, but to embrace the Christ (Anointed One), that was Jesus , which is the Holy Spirit in all of God's Messengers.
P/S - Reading the posts above this later, you can see the battle that is unfolding with our choices.
All the best CG, Regards Tony