There is no reason to believe that Harriot (or Raleigh) were atheists but certainly they were free thinkers and Harriot's scientific approach to the world was, to say the least, viewed with great suspicion by the church.
Walang dahilan na ang Harriot (o Raleigh) ay atheists ngunit tiyak sila ay free thinkers at Harriot's pang-agham sa buong mundo ay, sa mga sinasabi ng hindi bababa sa, natingnan na may mahusay na pinagbibintangan ng simbahan.