If we are not on the solid rock of Jesus Christ to begin with, then the test of our faith will fail in time.
Consider the parable of the sower. Some will hear God’s word for the first time, and immediately be excited; but because they have no depth, no root they wither away when persecution and tribulation comes. And others will only managed to endure for a while before the cares of this world and the deceitfulness of riches choke the word, and become unfruitful.
But there are those that receive the word and understand it. Having depth, and root in the word, bearing fruit and produces. “Some a hundredfold, some sixty, some thirty.” For true faith comes by hearing, and hearing the word of God. Romans 10:17