each knot pattern has a different meaning. You'd really have to research a specific design, or at least ask a question about a specific knot, to get a proper answer.
IMO tattoos mean specific...
Symbolism of a Cross and Heart Tattoo.
A heart with a cross in it is often called a "sacred heart." Though I don't fully know the answer for the true meaning in the piece, I do know that it is a...
Referred to as the "crucified skin" or simply as the "crucified", symbolizes the persecution of the skinhead cult by outsiders, the media, the general public, etc. Worn as a tattoo, pin, patch or...
It entirely depends on the context, it has been used in context of pagan groups and Christianity. Some pagan contexts can be Virgin, Mother, and Crone. Or Life, Death and Rebirth. For Christianity it...