Luke 9:62
But Jesus said, "No one who puts [his] hand on the plow and looks back is fit for the kingdom of God!"
Psalm 78:8-9
and not be like their ancestors, a stubborn and rebellious generation, a generation [that] did not make ready its heart, whose spirit was not faithful [to] God.
Acts 15:37-38
Now Barnabas wanted to take John who was called Mark along also,
Philippians 3:13
Brothers, I do not consider myself to have laid hold of [it]. But [I do] one [thing], forgetting the things behind and straining toward the things ahead,
Hebrews 10:38
But my righteous one will live by faith, and if he shrinks back, my soul is not well pleased with him."
Luke 17:31-32
On that day, whoever is on the housetop and his goods [are] in the house must not come down to take them away. And likewise the one who [is] in the field must not turn back
2 Timothy 4:10
For Demas deserted me, [because he] loved the present age, and went to Thessalonica. Crescens [went] to Galatia; Titus [went] to Dalmatia.
James 1:6-8
But let him ask for [it] in faith, without any doubting, for the one who doubts is like the surf of the sea, driven by the wind and tossed about.
2 Peter 2:20-22
For if, [after they] have escaped from the defilements of the world through the knowledge of the Lord and Savior Jesus Christ, and they are again entangled in these [things] [and] succumb to [them], the last [state] has become worse for them than the first.