1 Corinthians 14:4

14:4 The one who speaks in a tongue builds himself up, ¹  but the one who prophesies builds up the church.

1 Corinthians 15:47

15:47 The first man is from the earth, made of dust; the second man is from heaven.

[14:4]  ¹ sn The Greek term builds (himself) up does not necessarily bear positive connotations in this context.