But, others are only an inch deep in faith. Jesus explained in all:
Matthew 13:
3 And he spake many things unto them in parables, saying, Behold, a sower went forth to sow; 4 and when he sowed, some seeds fell by the way side, and the fowls came and devoured them up: 5 some fell upon stony places, where they had not much earth: and forthwith they sprung up, because they had no deepness of earth: 6 and when the sun was up, they were scorched; and because they had no root, they withered away. 7 And some fell among thorns; and the thorns sprung up, and choked them: 8 but other fell into good ground, and brought forth fruit, some an hundredfold, some sixtyfold, some thirtyfold.
If you are saying that any of the soils other than the good soil refers to someone who is saved, you are misinterpreting the parable. Expanding on the parable, there may be different degrees of good soil and the seed may grow at different rates, but only the good soil produces fruit.