Luke 9:62
Jesus said to him, "No one who puts his hand to the plough, and then looks back, is fitted for the Kingdom of God."
Acts 15:37-38
Now Barnabas wanted to take John who was called Mark with them.
Philippians 3:13
Brothers, I do not consider that I have captured it yet, only, forgetting what is behind me, and straining toward what lies ahead,
Hebrews 10:38
And he whom I accept as righteous will find life through his faith. But if a man draws back, my heart can take no pleasure in him."
Luke 17:31-32
A man who is on the roof of his house that day, with his goods in the house, must not go down to get them, and a man in the field, too, must not turn back.
2 Timothy 4:10
for Demas has deserted me for love of the present world, and has gone to Thessalonica. Crescens has gone to Galatia, and Titus to Dalmatia.
James 1:6-8
But he must ask with faith, and without any doubt, for the man who doubts is like the billowing sea, driven and blown about by the wind.
2 Peter 2:20-22
For if after men have escaped the corrupting influences of the world through the knowledge of the Lord and Savior Jesus Christ, they again become entangled in them and are overcome by them, their final condition is worse than their former one.