Wait, one can be crazy, and happy and contented also — boagie
Whether one holds a rational or irrational belief is contingent on the knowledge available and such a quality is independent from whether it is factual, absolute, transient, or not. None of these terms are mutually exclusive or intrinsic pairs. Followers of geocentrism used all the same standards, methods, and systems of rationality we have today, they were simply without the tools to see more than what was available. Were these men crazy? No they where brilliant scholars, the best of their time, more likely so than either you or I. The followers of heliocentrism were in fact the ones who held the correct belief, yet were labeled as crazy because no evidence to the contrary was presented due to the fact the tools to do so were simply unavailable.
What's actually crazy in my view is a man who thinks that in this world of violence, strife, and immense personal greed, who is actually aware the universe is populated with trillions of planets and many galaxies we cannot even see as well as phenomena that can only be "explained" in incomplete and half-assed manners (ie. black holes, they
probably go somewhere, we think), can even muster the audacity to think he knows what happens after death let alone the full nature of life and existence, it's borderline insanity. It's disgusting. They need to be rounded up in the street and locked far away from our children who still have a chance at true knowledge that is only unlocked when we at least have the seed of faith that is.. perhaps there's more than what we see. This is what religious people shield society from, close-minded thinking. The repulsive and insidious lie that the entirety of all there is to ever know, see, or experience is dictated solely what can be observed from the first opening and final closing of one's eyes in life. This is the reality of an infant and I for one refuse to let an entire generation of young men and women remain stagnant in this backward minded thinking without as little as a shout.
But back to the question. An established term has established definitions and these are generally more or less accurate. At least good starting points.
Mental health is obvious. Having the willpower to avoid performing actions that violate whatever the hell the government says makes you crazy. Or in a more friendly way, the ability to function as an independent and productive adult and provide for oneself regardless of circumstance whilst avoiding extreme actions deemed dramatically counterproductive to a free society.
Emotional health can probably be likened to having a good time and positive mental attitude while doing so. More often that not, at least. Oh and smiles. Or at least recognizing the emotional states of others and genuinely feeling they have value. Not necessarily more so than yours but value just the same.