Let him cheerfully allow himself to spend and be spent in that way

From ch.5 of Moby Dick – Ishmael’s morning-after response to what he terms the  innkeeper’s ‘skylarking … in the matter of my bedfellow.’

However, a good laugh is a mighty good thing, and rather too scarce a good thing; the more’s the pity. So, if any one man, in his own proper person, afford stuff for a good joke to anybody, let him not be backward, but let him cheerfully allow himself to spend and be spent in that way. And the man that has anything bountifully laughable about him, be sure there is more in that man than you perhaps think for.

Which accords nicely with Mr. Bennet’s lovely “For what do we live, but to make sport for our neighbours, and laugh at them in our turn?” from ch.57 of Pride and Prejudice.