When Maharaji said this, was it just a belief he was propagating?  Is it true, or not?  And if it is, why aren't aspirants and people at introductory programs told about this?  Is does seem somewhat significant.

Why doesn't this appear in on one of Dorri Jone's photographs?

If you don't practice this Knowledge, you will get rotten inside. There is so much energy contained in this Knowledge, just imagine how much harm it will be able to do you if you know it, but do not use it properly.’
(From ‘The Sayings of Guru Maharaj Ji’, Vol. 3.)