Matthew 17:5 (KJV) While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him.
The way of God is not easy for man to understand on his own. We need Jesus Christ to lead us to God. He is the one that God introduced to us that we should hear from him. He knows the way to the Father. Every other teacher is a false teacher.
The doctrines of Jesus Christ are the true teachings of God. When we listen to these doctrines, we will understand what the will of God is. We cannot please God if we don't obey His commandments. The doctrines that we are listening to are the commandments of God.
The commandments of God are the teachings of Jesus Christ which He gave to the disciples and they hand over to us. We are to obey the doctrines and follow all the we learn as it is written in the Bible.
Only Jesus Christ is our Teacher. He alone can lead us to the Father. We must accept His doctrines and obey them. There will be no other way of salvation outside Jesus Christ.
There are many false teachers in the world. They disguise themselves and deceive innocent souls. Those who follow them are only heading to destruction. We must not listen to anyone who is not teaching us what is written in the Bible.
Matthew 28:20 (KJV) Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.