Jesus says: “No man, having put his hand to the plough, and looking back, is fit for the Kingdom of God” (Luke 9:62).
“For if after they have escaped the pollutions of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning” (2 Peter 2:20).
“[TAKE HEED, BRETHREN], lest there be in any of you an evil heart of unbelief, in departing from the living God. But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin. [FOR WE ARE MADE PARTAKERS OF CHRIST, IF WE HOLD THE BEGINNING OF OUR CONFIDENCE STEDFAST UNTO THE END]” (Hebrews 3:12-14).