We're all worried about the other guy. "Lord, you want me to forgive him, he should forgive me!" "I have given so much to this marriage, what about him/her?" "I have done my financial part for the church. It's time the others gave." "I have poured myself into this venture. Let someone else do it for a while."
 
On and on it goes as we compare our actions to that of others. In answer to the question, "Lord, what about him, Jesus said, "What concern is it of yours. You follow me!" (John. 21:22 Amplified Bible)
 
Each of us is responsible to obey God, be faithful to Him, and do the right thing in every situation, regardless of what others do or don't do. As a husband or wife we can do our part in the marriage and that is what we are accountable to do. If the other person is lazy or disobedient, what is that to us? We must do what the Lord wants US to do. We can't use the behavior of others as an excuse. If we obey God in tithes and offerings, that is all we should care about. What others do is inconsequential.  We can obey for ourselves. We can't obey for the other guy. And, if the other guy obeys or doesn't, that should have no bearing on us whatsoever.
 
What if someone is more successful than we are? Success is determined by God and not by man. If you are doing what God told you to do, regardless of the outward manifestations of success or the lack thereof, you ARE successful! Be concerned about yourself and about your obedience and faithfulness to the will of God! The other guy will have to answer to God for himself!