If a person does not believe in the rapture, but loves the Lord undeniably, is that person taken at the time of the rapture or are they left behind to endure the tribulation?
Believing in the rapture is not required for inclusion in the rapture. When we accept the Lord’s death as payment for our sins and ask Him to be our Savior, we become members of His Church and the Holy Spirit is sealed within us. From that point on all the rights and privileges that accrue to the Church accrue to us as well, and that includes the rapture.
Not believing in the rapture is no different than any other mistaken belief about it. When it happens, all born again believers will go, regardless of what they thought about it.