@FrankHubeny While Marcel recognized that human interaction often involved objective characterization of "the other", he still asserted the possibility of "communion" – a state where both individuals can perceive each other's subjectivity. I like Marcel's thinking, from what I've learned from you and Wiki. I'd like to read The Mystery of Being and The Decline of Wisdom as they're freely available on archive. org And I appreciate so much that you have brought it to my attention, thank you.