I don't want to preach and I don't know your situation but I offer my perspective regardless. I may be talking completely past you because I'm not familiar with the term organic depression, and that's ok, maybe someone else will find this helpful.
I grant there may be some mechanism that can be fixed alleviated by chemicals acting on the body but everything is connected, body-mind-soul. As far as I can tell, depression is in essence a negative feedback loop of bad thoughts that flood your brain and body incessantly creating negativity and sluggishness that further shape your thoughts and behaviour.
A depressed person may not even realize their mind may be constantly telling them they suck or they're not worthy or whatever, but that is, as all thoughts and emotions are, illusionary in the sense that you don't have to take that as your own. You don't have to associate your being or identify as that chatter or the phenomenon passing through that body. You're purer and more beautiful and more deserving of love than that.
Thoughts can have tremendous energy especially if you get provoked by or stuck to them. What prolonged persistent meditation practice (say at least 2x30 min per day) may help one achieve is a sort of mental clarity or non separateness from/non attachment to thoughts, seeing how the mind really works.