I am human, I consider nothing human is alien to me.

[Homo sum: humani nil a me alienum puto.]

Terence (186?-159 BC) African-Roman dramatist [Publius Terentius Afer]

Heauton Timoroumenos [The Self-Tormentor], l. 77

Alt. trans.:

• "I am human [being], I consider nothing human to be alien to me."
• "I am a human being, so there is nothing human I do not feel to be my concern."
• "I am a human being; nothing human is alien to me."