Guru Nanak, the first Sikh Guru and the founder of Sikhism, was a Bhakti saint. He taught, states Jon Mayled, that the most important form of worship is Bhakti. "Nam-simran" – the realisation of God – is an important Bhakti practice in Sikhism. Guru Arjan, in his "Sukhmani Sahib", recommended the true religion is one of loving devotion to God. The Sikh scripture Guru Granth Sahib includes suggestions for a Sikh to perform constant Bhakti. The Bhakti themes in Sikhism also incorporate Shakti (power) ideas.