Activity of mind, I think, is the only thing that keeps one’s life going, unless one has a larger emotional activity of some other kind. One’s mind that’s like a restless steamer paddle urging the ship along, tho’ the wind is fallen & the sea is as still as glass. I must now expound another simile that has been rolling itself round in my mind for many days past. This is that I am a Norseman bound on some long voyage. The ship now is frozen in the drift ice; slowly we are drifting towards home. I have taken with me after anxious thought all the provisions for my mind that are necessary during the voyage. The seals & walruses that I shoot during my excursions on the ice (rummaging in the hold) are the books that I discover here & read. It amuses me to carry on the comparison, tho’ I admit that written down it has something absurd about it. What a force a human being is! There are worse solitudes than drift ice, & yet this eternal throbbing heat & energy of ones mind thaws a pathway thro; & open sea & land shall come in time. Think tho’, what man is midst fields & woods. A solitary creature dependent on winds & tides, & yet somehow suppressing the might of a spark in his brain.