My beautiful cousin, Mallory, has a blog that gives advice and provides help and understanding to those that suffer with a drug addiction, (and to their families too.) This quote was perfectly placed in her blog post today by President Boyd K. Packer,  "It was meant to be that life would be a challenge. To suffer some anxiety, some depression, some disappointment, even some failure is normal. If you have a good miserable day once in a while, or several in a row, stand steady and face them. Things WILL straighten out. There's great purpose in our struggle in life." 

Check out her blog at www.allinmalshead.blogspot.com