God came to earth in the flesh as Jesus. He paid our penalty for sin by being crucified by the religious leaders of that time. There is a penalty for sin that Jesus paid for us if we accept it.
If we believe in Jesus as our savior and that He is fully God and fully man and we turn from our sin (repent). Then we will receive that free gift of grace and life.
But remember to turn from sin.
For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord. Romans 6:23 NASB
Freedom to live but dead to sin.
Therefore do not let sin reign in your mortal body so that you obey its lusts, and do not go on presenting the members of your body to sin as instruments of unrighteousness; but present yourselves to God as those alive from the dead, and your members as instruments of righteousness to God. For sin shall not be master over you, for you are not under law but under grace. What then? Shall we sin because we are not under law but under grace? May it never be! Do you not know that when you present yourselves to someone as slaves for obedience, you are slaves of the one whom you obey, either of sin resulting in death, or of obedience resulting in righteousness? But thanks be to God that though you were slaves of sin, you became obedient from the heart to that form of teaching to which you were committed, and having been freed from sin, you became slaves of righteousness. I am speaking in human terms because of the weakness of your flesh. For just as you presented your members as slaves to impurity and to lawlessness, resulting in further lawlessness, so now present your members as slaves to righteousness, resulting in sanctification. Romans 6:12-19 NASB
Let love be without hypocrisy. Abhor what is evil; cling to what is good. Be devoted to one another in brotherly love; give preference to one another in honor; not lagging behind in diligence, fervent in spirit, serving the Lord; rejoicing in hope, persevering in tribulation, devoted to prayer, contributing to the needs of the saints, practicing hospitality.
Romans 12:9-13 NASB https://bible.com/bible/100/rom.12.9-13.NASB
If I say, “Surely the darkness will overwhelm me, And the light around me will be night,” Even the darkness is not dark to You, And the night is as bright as the day. Darkness and light are alike to You.
Psalms 139:11-12 NASB https://bible.com/bible/100/psa.139.11-12.NASB
When Christ returns a new Heaven and new earth will be the reward for those who believe in Jesus (Revelation 21). He will wipe away all tears. Death will be no more. And He will supply all that we need. Our bodies will be new and will not grow old. Our minds will be renewed and sin will not corrupt it.
Are you ready?
Therefore repent and return, so that your sins may be wiped away, in order that times of refreshing may come from the presence of the Lord; and that He may send Jesus, the Christ appointed for you, whom heaven must receive until the period of restoration of all things about which God spoke by the mouth of His holy prophets from ancient time.
Acts 3:19-21 NASB https://bible.com/bible/100/act.3.19-21.NASB