"It is clear," replied Don Quixote, "that you are not experienced in adventures. Those are giants, and if you are afraid, turn aside and pray whilst I enter into fierce and unequal battle with them." Uttering these words, he clapped spurs to Rocinante, his steed, without heeding the cries of his squire, Sancho, who warned him that he was not going to attack giants but windmills. But so convinced was he that they were giants that he neither heard his squire's shouts nor did he notice what they were, though he was very near them. He was .
conscientious
deluded
optimistic
unmotivated