Knowledge can be painful.
It brings awareness.
Like when a child who comes into the world pure and uncorrupted by the paradigm that we have created, and through knowledge, this child is introduced to the concept of time.
this causes the child from that moment on to spend his life looking at clocks, as they are counting down his life, terrified by his own mortality.
So, in a way, knowledge comes at the price of your immortality,
for one is not born with the concept of death, but has to learn of it.