Whether the words are spoken or written you still have to digest and absorb what has been said and, with science, you are only going to get so far without maths;. this will always be your limitation, no matter how good you are, I think. I think you are looking at many years of concerted effort to 'get used to' the hard stuff like GR, QM etc... there are no complete classical equivalents that we can use to visualise at this level. The other thing is scientific knowledge is in constant flux, scientists have to be in this state to. I wouldn't let it get you down, as long as you enjoy it and find it interesting and useful that's all that matters I think Richard Feynman once said nobody really understands QM.