Trust is the name of a song that Matrim Cauthon remembers while dancing in Salidar. It is unlikely that those lyrics are known or intended by the musicians.  He has the memory of the man that wrote the song, or at least those lyrics. 
Give me your trust, said the Aes Sedai.
On my shoulders I support the sky.
Trust me to know and to do what is best,
And I will take care of the rest.
But trust is the color of a dark seed growing.
Trust is the color of a heart’s blood flowing.
Trust is the color of a soul’s last breath.
Trust is the color of death.
Give me your trust, said the queen on her throne,
for I must bear the burden all alone.
Trust me to lead and to judge and to rule,
and no man will think you a fool.
But trust is the sound of the grave-dog’s bark.
Trust is the sound of betrayal in the dark.
Trust is the sound of a soul’s last breath.
Trust is the sound of death.
This song is unfinished in the book, and there are several fan versions of the completed song.
- [The Color of Trust - https://www.youtube.com/watch?v=31afeiVj6aM]
- Trust by Wot wiki user Joedmd