The best way to read in another language

When I start reading in a new language, I accept that I am not going to understand most of it. My brother compared it to mowing a lawn: if the grass is high, you set the blades high on the first pass and lower them the next time through. I go over the same content again and again, and each time I pick up something I missed before. Do you push through content you only half understand, or do you wait until you feel ready for it?