Tikket was about daves depression?

Hey! I was listening to Tikket and reading lyrics. I noticed some verses which could show that dave had depression,especialy this one:
The vigour of another, won't give me the energy
To feel the lust I don't feel, a straight line of evil synergy
Good morning to ya snakebit and to all ya powder kegs of snow
I'm a transparent fish in a barrel, I feel the shakes, but it doesn't show
What do you guys think?

Certainly open for interpretation, only the man himself would know (and other people that contributed to the lyrics). I always liked them