Sikh spirituality is centered around this need to understand and experience God, and eventually become one with God.
To do this a person must switch the focus of their attention from themselves to God. They get this state, which is called Mukti (liberation), through the grace of God. That means it's something God does to human beings, and not something that human beings can earn. However, God shows people through holy books, and by the examples of saints, the best ways to get close to him.