I have answered this question earlier on in the thread when we had an exchange about the fact that a novice Christian aspirant can't of themselves live up to the teachings of Jesus, but as they realize their Godly source, only then can their life be pure. I said... "Jesus was not ignorant, he knows that a human being can't just change their present state of being to a higher state through mere mental conceptualization, it requires a spiritual transformation that is an inner process."
#58
The summation of the teachings of Jesus is John 3:3 Jesus replied, “Truly, truly, I tell you, no one can see the kingdom of God unless he is born again”
That which is born of flesh is flesh, that which is born of spirit is spirit, unless you are born of the spirit, you will not see the kingdom of God.