Why are so many believers turning away from faith according to the scriptures? Jesus explained it in His famous "last things" teachings and Matthew recorded it in Matthew 24 {also Luke in Luke 13): (1) because sin will abound, and (2) because of this increase in sin and lawlessness, the love of many Christians will wax cold. "Then many false prophets will rise up and deceive many {the deceived seldom know it is happening}.  And because lawlessness will abound the love of many will wax cold.  But he who endures to the end, shall be saved."  (Matthew 24:11-13) So one might say easily based on Jesus and the Bible that the rapid increase among churches and Christians due to the turning away from faith is primarily because of:  (1) the work and proliferation of many false prophets, which is working in that many are deceived and led away from truth into half truth, lies, and tangents; (2) the rising tide of the moral decay of sin and lawlessness in the world that Paul described in I Thessalonians as the "falling away" has that vast increase as the Holy Spirit is withdrawn from the world, however we can not blame Satan for the ever present "spirit of sin within us that lusteth to envy and covet"  (James 4:5); and (3) the lukewarmness of Christians and church members has been a major problem since the days the Risen Christ through the Apostle John writing the book of Revealtion criticized church membetrs for being "neither hot or cold", however what is more influential in these current times is the bad results coming from the 5 stages of the Falling Away of II Timothy 4:4,5--(a) an intolerance among Christians of sound doctrine, generally disguised as keeping up with a new generation or a new age, (b) Christians more motivated by purpose driven personal wants and desire than the Spirit of Christ {this is more of sin abouding and the love of Christ, Bible, and God waxing cold as compared to the "cares of this world, and the deceitfulness of riches", (c) preferential treatment by pulpit committess and members for "itching ears teachers" {it is always the other guy or guys and not us or our church}, (d) as church members turn away from truth, they naturally turn away from Christ and toward more habitual sin {"Beware brethren," Paul wrote and it is recorded in the scripture of Hebrews 3:1, "that there be in any of you an evil heart of unbelief in departing from the living God"}, and (e) in the last and final stage of the historical great apostasy predicted in Scripture, the being "turned into fables" because of the impact on church members has become so influential that they are blinded from the reality of their blindness.  In other words, they no longer have "eyes to see and ears to hear".