This maxim, #134 in Baltasar Gracián’s The Pocket Oracle and Art of Prudence, could be read in an unhelpful way. But instead of reading this as a celebration of selfishness, I see this (especially in the light of his other maxims) as an exhortation to be what Nassim Nicholas Taleb would call Antifragile. Have options. Don’t put all of your eggs in one basket.
The whole set of Wednesday Wisdom images can be found in my Creative Commons-licensed Flickr set.