Venus,
So you are impressed with Jesus teachings? You do well. Nicodemus was also impressed at this departure from the religion of his day. However, this wasn't enough... three times Jesus told him that he must be "Born Again"; else he would never see, enter or inherit the Kingdom of God.
This is a hard teaching. Not only must we be in agreement with Christ, but we must allow the formation of a new spirit within us, one born of God. Our hearts must be circumcised. This is somewhat painful, if only to our intellect and pride.
Most of us are quite happy with our first birth and see no need for another one. But, Jesus also threw a bucket of cold water on some other common folks that were getting pretty excited about his teachings.
John 6
54 Whoever eats My flesh and drinks My blood has eternal life, and I will raise him up at the last day. 55 For My flesh is food indeed, and My blood is drink indeed. 56 He who eats My flesh and drinks My blood abides in Me, and I in him...This is the bread which came down from heaven—not as your fathers ate the manna, and are dead. He who eats this bread will live forever.”...
He (Jesus) said to them, “Does this offend you? ... 63 It is the Spirit who gives life; the flesh profits nothing....
66 From that time many of His disciples went back and walked with Him no more. 67 Then Jesus said to the twelve, “Do you also want to go away?”