Truth exists for minds and minds know truth. This means that truth is superior to human minds. Human minds are mutable. Beliefs may vary from one person to the next, but truth does not.
To quote Nash:
If truth and the human mind were equal, truth could not be eternal and immutable since the human mind is finite, mutable, and subject to error. Therefore, truth must transcend human reason; truth must be superior to any individual human mind as well as to the sum total of human minds. From this it follows, that there must be a mind higher than the human mind in which truth resides. (Nash, p.163)