Either way, we’re all in this vessel together
Literally: all – “sort of thing” – one – body
Alternately: Disparate things mixing together to form a harmonious or unified whole. A workable sum of parts. The ideal of American society.
Notes: The 渾 may be replaced with homophone 混, “mix.” The compound may also be followed by ～となる (to naru), “to become (a complete whole).” 渾然一体となる can also simply mean “to be joined together.”