Guru Gobind Singh Ji says :

I have gone to the houses of saravags, siddhs, siddhas, yogis and jatis.

I have also come across groups of warrior demons, nector-loving gods, and holy men of different sects.

I have examined the religions of various countries, but none of them preaches the true devotion to God, the Lord of Life.

All these religions are good for nothing, if they cannot win the the love and grace of God.