Here is a good quote from Secret Gospel of Thomas -

[Guest guest]

Secret Gospel of Thomas, Christ promises us spiritual fulfilment "I shall give

you what no eye has seen, what no ear has heard, what no hand has touched and

what has never arisen in the human mind." This description is not unlike the

Upanishadic experience "the Self is devoid of birth and death, it neither grows

old nor decays and the accidents of life do not affect it. The Self transcends

space and time; what is great is not too great for it to comprehend and what is

small is not too small to escape its attention. It is the Self of All".

http://www.sol.com.au/kor/8_01.htm