The basic teachings of a True Master are:

Unity of Man

We are already one as man. Man is the highest in all creation, next to God. 

We are born in the same way, and we have the same inner and outer construction. 

Man is an embodied soul, essentially a conscious entity; and as a soul, man is of the same Essence as that of God. We are, therefore, members of one family, and we are related to each other as brothers and sisters in God. 

The conscious entity, which we are essentially, is controlled in the body by some higher Power called by various names – God, Word, Naam, Ek-Onkar, and many others.

Right understanding of the above: that we are all One as man, as soul, and as worshippers of God – the controlling Power – will result in right thoughts, right speech, and right actions … thus bringing the Kingdom of God on earth.