Anyone who gives you a cup of water to drink because you belong to Christ, amen, I say to you, will surely not lose his reward.

“Whoever causes one of these little ones who believe in me to sin, it would be better for him if a great millstone were put around his neck and he were thrown into the sea. If your hand causes you to sin, cut it off. It is better for you to enter into life maimed than with two hands to go into Gehenna, into the unquenchable fire. And if your foot causes you to sin, cut it off. It is better for you to enter into life crippled than with two feet to be thrown into Gehenna. And if your eye causes you to sin, pluck it out. Better for you to enter into the Kingdom of God with one eye than with two eyes to be thrown into Gehenna, where their worm does not die, and the fire is not quenched.

“Everyone will be salted with fire.Salt is good, but if salt becomes insipid, with what will you restore its flavor? Keep salt in yourselves and you will have peace with one another.” –Gospel of Mark

Praise is unseemly in a sinner’s mouth, since it has not been put there by the Lord. For praise should be uttered only in wisdom, and the Himself then prompts it. Do not say, ‘The Lord was responsible for my sinning,’ for He does not do what He hates. Do not say, ‘It was He who led me astray,’ for He has no use for a sinner. The Lord hates all that is foul, and no one who fears him will love it either. He himself made human beings in the beginning, and then left them free to make their own decisions. If you choose, you keep the commandments and so be faithful to His will. He has set fire and water before you; put out your hand to whichever you prefer. A human being has and death before him; whichever he prefers will be given him.  –Sirach chapter 15

“Why are you so resentful and crestfallen.
If you do well, you can hold up your head;
but if not, sin is a demon lurking at the door:
his urge is toward you, yet you can be his master.”

Genesis