Jealousy

[Telchar]

Melkor was jealous of (Aulë) him, for Aulë was most like himself in thought and in powers

And Melkor knew of an that was done, for even then he had secret friends and spies among the Maiar whom he had converted to his cause; and far off in the darkness he was filled with hatred, being jealous of the work of his peers, whom he desired to make subject to himself.

Both qoutes from SILM - The latter concerning the other Valar but especially Aulë and Tulkas
It could be either one of them that you have in mind - but I wote Aulë
[img]smilies/rolleyes.gif[/img]

[ March 14, 2002: Message edited by: Telchar ]