Which one of these four quotes is attributed to Richard Halliburton?
→ It is dangerous to be sincere unless you are also stupid.
→ Just about a month from now I'm set adrift, with a diploma for a sail and lots of nerve for oars.
→ The conscience of children is formed by the influences that surround them; their notions of good and evil are the result of the moral atmosphere they breathe.
→ There shall be eternal summer in the grateful heart.