Well there are some exceptions, some who are not too proud to accept the truth that all things are of God but by Christ Jesus.
There is the recent case of a young man of the Sikh religion who began reading the Bible study aid “Let God Be True” and studying it with Bible.
In the Sikh religion all the men let their hair grow long and they never shave. They coil their long hair, of which they are very proud, into a ball on top of their heads and cover it with a turban. So, imagine the surprise when one day this Sikh gentleman walked into their Kingdom Hall in Bombay with his hair cut and brushed in the Western style and his chin shaved clean.
Clearly he was humble enough to be taught and he was not afraid to follow the path of truth when once he saw it. (Mic. 6:8)