A friend described the onset of her depression as a shocking experience. Mental illness often enters our life this way. It knocks us off of our feet. It can change our life in a way that is both drastic and instant.
Getting back up is a series of small steps. Some days we are not able to take any steps. Some days we fall back a little or a lot. Some days we can only rest where we are and breathe. The process of getting back up is rarely one that can be accomplished without the helping hand of another human being. It might be a friend, a therapist, a family member, a doctor. It might be many helping hands.
And you might not ever stand as tall as you once did before mental illness knocked you down. And this may cause grief and take some acceptance. But you CAN stand again.