What can be known about God is known to all people because God Himself has revealed it to them and in them. We all know right from wrong because God has written His laws in our hearts. Nobody will have any excuse. Nobody will be able to say that they did not know. The Holy Spirit convicts the whole world of SIN, RIGHTEOUSNESS and JUDGMENT. The laws of God are written in our conscience. We are immediately convicted if we even think wrong, so nobody will have any excuse.
The apostle Paul also wrote in Romans 8:12 "we are under obligation, not to the flesh, to live according to the flesh— 13for if you are living according to the flesh, you must die; but if by the Spirit you are putting to death the deeds of the body, you will live. 14For all who are being led by the Spirit of God, these are sons of God."
Jesus Christ said:"My sheep LISTEN to My VOICE and they FOLLOW Me." The Holy Spirit speaks to all men. The Holy Spirit convicts all men of SIN, RIGHTEOUSNESS and JUDGMENT, but very few LISTEN. If we LISTEN to the Holy Spirit and we live by the guidance of the Holy Spirit we will not sin, but if we go after the lusts of our flesh and our carnal desires, then we must PERISH. If we yearn for and go after the guidance of the Holy Spirit and we obey Him, He will reveal Jesus Christ to us. We will get to KNOW Him. If we seek Him, we will find Him. If we seek TRUTH, the Holy Spirit will reveal Jesus Christ to us and He will give His SPIRIT in those who OBEY Him. Those who do not have the Spirit of Christ do not belong to Him.
Most believers do not want the Holy Spirit. They don't want the Spirit of Christ. They just want salvation. They don't want Jesus Christ and therefor they will perish. They do not LISTEN to the Holy Spirit. They live by their own opinion and their carnal minds. They listen to other people and they follow after their desires. They do not live by the SPIRIT, they live by the FLESH and therefor they will perish if they do not REPENT.
If we LISTEN tot the SPIRIT of God who speaks to each and every one of us and if we obey Him, we will LIVE but if we ignore Him we will perish.
May Jesus bless you.