sometimes this is hard to do, yet if life seems too hard, start singing praises to God - pray/thank Him for taking care of you, for seeing you through - be dependent on Him, waiting for Him to answer - we always want God's best in our lives.
They "work heartily, as for the Lord and not for "men" They deny their selfish desires even when it's hard. They don't excuse sins but learn from them. They don't let past failures hold them back. Their consuming goal is knowing Christ.