Amaan the Wise at the Temple of Telhamat in Hellfire Peninsula wants you to return to Sedai's Corpse, northeast of the Temple of Telhamat, and use the Seer's Relic at that location. Return to him after you've completed this task.
The stubborn close their mind and convince themselves of one truth. The wise keep an open mind to the different possibilities leading to and stemming from the present.
Take this relic with you to where you found Sedai. See not with your eyes, <name>, but with your mind.