this sounds a little simple, but I think if we didnt know illness we wouldnt really feel the exhiliration of good health. and if we never cried, we wouldnt be able to recognize joy. in a way, the good only gains value when it is contrasted with the bad

I thank you, God, who lives always, and Who, as i awaken, has in mercy returned my soul to me; we can ever trust in you.