We get realistic. We adapt to reality. We give up. We figure out that wolves eat and sheep get eaten, and we decide we had better be wolves, or at least become sheep in wolves clothing. We toughen up.
All sin starts with giving up our dreams.
Hold back a little love here and there, cause you can't afford to be a sucker and give more than you get. Look the other way when there is someone in need. Treat your heart like a checkbook, and carefully budget how much of it you give away. Make sure you get your money's worth. A little child shall lead you.