The true teacher defends his pupils against his own personal influence. He inspires self-trust. He guides their eyes from himself to the spirit that quickens him. He will have no disciples.
Respect for ourselves guides our morals respect for others guides our manners.
What guides Marxism then is a different model of society and a different conception of the function of the knowledge that can be produced by society and acquired from it.
An investigator starts research in a new field with faith a foggy idea and a few wild experiments. Eventually the interplay of negative and positive results guides the work. By the time the research is completed he or she knows how it should have been started and conducted.
The momentum of freedom in our world is unmistakable - and it is not carried forward by our power alone. We can trust in that greater power Who guides the unfolding of the years. And in all that is to come we can know that His purposes are just and true.