“I have written you this brief letter through Silvanus (I know him to be a faithful brother) to encourage you and to testify that this is the true grace of God. Take your stand in it!” 1 Peter 5:12 HCSB

Peter wrote this letter to encourage Christians who have left home towns and settled in other areas around the Roman Empire. His second mission was to testify to the true grace of God. Did he accomplish this? Does he lay down what the true grace of God is? 

“Therefore, with your minds ready for action, be serious and set your hope completely on the grace to be brought to you at the revelation of Jesus Christ. As obedient children, do not be conformed to the desires of your former ignorance. But as the One who called you is holy, you also are to be holy in all your conduct; for it is written, Be holy, because I am holy.”

1 Peter 1:13-16 HCSB

https://www.bible.com/72/1pe.1.13-16.hcsb

I think so. The grace of God is not to cover any and every sin, but for those who are striving to be holy. 

Paul says it this way: “What should we say then? Should we continue in sin so that grace may multiply? Absolutely not! How can we who died to sin still live in it?”

Romans 6:1-2 HCSB

https://www.bible.com/72/rom.6.1-2.hcsb

Jesus does not make living life easier through grace but actually harder. His grace helps in our weakness. 

““You are the salt of the earth. But if the salt should lose its taste, how can it be made salty? It’s no longer good for anything but to be thrown out and trampled on by men. “You are the light of the world. A city situated on a hill cannot be hidden.

In the same way, let your light shine before men, so that they may see your good works and give glory to your Father in heaven.

Therefore, whoever breaks one of the least of these commands and teaches people to do so will be called least in the kingdom of heaven. But whoever practices and teaches these commands will be called great in the kingdom of heaven.

“You have heard that it was said to our ancestors, Do not murder, and whoever murders will be subject to judgment. But I tell you, everyone who is angry with his brother will be subject to judgment. And whoever says to his brother, ‘Fool! ’ will be subject to the Sanhedrin. But whoever says, ‘You moron! ’ will be subject to hellfire.

“You have heard that it was said, Do not commit adultery. But I tell you, everyone who looks at a woman to lust for her has already committed adultery with her in his heart.

“It was also said, Whoever divorces his wife must give her a written notice of divorce. But I tell you, everyone who divorces his wife, except in a case of sexual immorality, causes her to commit adultery. And whoever marries a divorced woman commits adultery.

But let your word ‘yes’ be ‘yes,’ and your ‘no’ be ‘no.’ Anything more than this is from the evil one. 

“You have heard that it was said, An eye for an eye and a tooth for a tooth. But I tell you, don’t resist an evildoer. On the contrary, if anyone slaps you on your right cheek, turn the other to him also. As for the one who wants to sue you and take away your shirt, let him have your coat as well. And if anyone forces you to go one mile, go with him two. Give to the one who asks you, and don’t turn away from the one who wants to borrow from you. “You have heard that it was said, Love your neighbor and hate your enemy. But I tell you, love your enemies and pray for those who persecute you,”

Matthew 5:13-14, 16, 19, 21-22, 27-28, 31-32, 37-44 HCSB

https://www.bible.com/72/mat.5.13-14,16,19,21-22,27-28,31-32,37-44.hcsb

Paul instructs his young preacher Titus that the Grace of God has appeared with salvation. And it will teach us a few things. 

“For the grace of God has appeared with salvation for all people, instructing us to deny godlessness and worldly lusts and to live in a sensible, righteous, and godly way in the present age, while we wait for the blessed hope and appearing of the glory of our great God and Savior, Jesus Christ. He gave Himself for us to redeem us from all lawlessness and to cleanse for Himself a people for His own possession, eager to do good works.”

Titus 2:11-14 HCSB

https://www.bible.com/72/tit.2.11-14.hcsb

The short explanation is that God’s grace is for those who are trying to follow Him. If you're using God’s grace to justify your wrong motives and actions you are not crucifying your flesh, but fulfilling its lusts then your not following God’s word.