1 Peter 4:18

"And, 'If it is hard for the righteous to be saved, what will become of the ungodly and the sinner?'" NIV translation

Peter seems to be using Proverbs 11:31 here but with a little different wording. Since it took the Son of God dying for the righteous to be saved, what more is available to save the ungodly? This is similar to what it says in Hebrews 6:6 concerning those who turn their back on Jesus Christ. There is nothing left to save them as "they are crucifying the Son of God all over again".

1 Peter 4:19

"So then, those who suffer according to God's will should commit themselves to their faithful Creator and continue to do good." NIV translation

When we suffer for following Jesus, we must understand that God is still in control. He is the Creator and therefore has the power to take care of us in any situation. We must commit ourselves to Him and His will for our lives. We can know His will through the Holy Spirit and trust that, if we are in His will, He will take care of us.