Is There Objective Truth?

If there is no objective truth, why seek it?
If there is objective truth, where did it come from, and why is it static?
If there is objective truth, those who hold that my truth can be different than yours would be following folly. 
If there is no objective truth, what can we know?  Wouldn't the very statement be self defeating.  In other words we couldn't know whether or not there was no objective truth.