If atheists really believe that our perceptions of reality must remain subjective where does their desire to?

[Flying Above the Lotus]

put forward their ideas as though it was THE TRUTH come from? Do this also show that while their mouths will not confess it that the desire to speak some thing true and real exist with in all of us? If this is not their desire why would the speak about it at all? Why do atheist actions and life styles not represent what they claim to believe?