With mental strength, you can get through ANYTHING, but not with physical strength.

They are both important. If you are physicaly mentaly it can affect your physical health and I suppose the same can be said of the opposite.

Hate it when people say'I would never get depression, im too strong mentaly to get it' - what a load of bollocks. Depression is a physical thing. When under stress, Serratonin in the brain drops. Usualy it rises itself, but if you have been under long periods of stress it sometimes doesnt, leading to depression that needs a tangible treatment.