There is one alone, and there is not a second; yes, he hath neither child nor brother: yet is there no end of all his labor; neither is his eye satisfied with riches; neither saith he, For whom do I labor, and bereave my soul of good? This is also vanity, yes, it is a grievous labor.

For if they fall, the one will lift up his fellow: but woe to him that is alone when he falleth; for he hath not another to help him to rise.

Again, if two lie together, then they have heat: but how can one be warm alone?