I love the idea of having 4 colors in 1 pen, but the execution is poor. It writes like a regular ball point pen - sometimes to get the ink flowing I have to make a little scribble or press down harder, neither of which can be done in a bible. It fades in and out, especially when starting, even though it's brand new. Also, the yellow is nearly invisible compared to the more vibrant pink & blue. It doesn't seem to bleed, but I can see traces of color on the back of the page where I make notes. I would not recommend for bible marking. However, it might be great for a textbook or on regular paper, especially since the colors are different from the regular colors on a 4-color pen.