Not only heeding the teachings of God through Jesus (and the Apostles) but firmly holding to them all our lives sets us on the road to complete freedom from the tyranny of the human nature and keeps us on a road to life of longlasting fruitfulness to achieve our greatest potential to the glory of God. We might not understand or be able to accept all their teachings but we should accept what we can and hold to it. To heed these teachings should be easy now Christ has died for sins as God's sacrificial lamb so we know God is love. Love towards God who loves us so much should smooth the process of accepting Christ's teachings. It should be a simple matter to love God in obedience to what Christ calls the greatest commandment. You might merely be uncertain that the death He died was for you personally and just need assurance of it. Then it will be a change of things as you let yourself be assured that is was for you as well as for others that He died. Then the teachings may be so much more acceptable and comprehensible. Gifted gospel preaching with genuine faith may be all it takes to give you the assurance you need that it is for you that Christ died. Then a simple seeking of His teachings can set you firmly on the path to the best way to live. So given this need of personal assurance, is there a message to meet the need? Fortunately there is a teaching of Christ which points to such a teaching: That it is 'as Moses lifted up the serpent in the wilderness' that the Son of Man was to be lifted up. This applies the crucifixion of Christ as widely to individuals as when Moses lifted up a bronze snake on a pole for anyone who was bitten by a snake like the lifted one to look at it to be healed. A peculiar wisdom of God easily mistaken for folly unless we have better faith in God. Jesus Christ taught too that our greatest enemy from which we need saving is our own sin or as the apostle Paul put it, deeds of our own human nature. The cure God sent is the Lord Jesus Christ born a human and even having John the Baptist baptise Him to show His willingness to follow the teachings John was preaching. He was made human so He could be put up on a cross of wood and bleed and die and those who look to Him now are saved. The Lord Jesus, the Son of Man made human and mortal, was on that cross as God's cure from deeds done according to human nature which lead to mortality and death. Both the sinful tendency of human nature and death itself are lifted up on that cross as emblem and sacrifice provided by God in His love for whoever will look to Christ crucified and believe.
