I don’t understand it that way. I think that baptism is a gate. It is a gate which puts us on a path; and the name of the path is the straight and narrow path. The straight and narrow path leads upward from the gate of baptism to the celestial kingdom of heaven. After a person has entered the gate of baptism, he has to press forward with a steadfastness in Christ, as Nephi expresses it, having a perfect brightness of hope, and a love of God and of all men; and if he endures to the end, then he gains the promised reward.
(Bruce R. McConkie, Conference Report, Oct. 1950, p. 16)