When my soul was embittered, when I was pricked in heart, I was stupid and ignorant; I was like a brute beast towards you. Nevertheless I am continually with you; you hold my right hand. You guide me with your counsel, and afterwards you will receive me with honour. (Psalm 73: 21-24)

When we are not happy with our situation we treat others badly. We tend not to like change. Even positive change can make us grumpy or worse.

The embittered (chamets) of the psalm is to be made sour as when yeast is added to flour. This is, of course, what makes bread rise.

Yeast takes time to work. With care and patience the bitterness is transformed in bread, in beer, and even in our heart.

Above is is a microscopic view of recrystallized extract from bread provided by Molecular Expressions.