"But God, who is rich in mercy, because of His great love with which He loved us, even when we were dead in trespasses, made us alive together with Christ (by grace you have been saved)" Ephesians 2:4-5, NKJV.
It is actually quite prideful to walk around feeling like you are entitled to things. We don't deserve or demand good things in our lives. God has lovingly blessed us with His grace and mercy. Mercy is being spared from the bad things we deserve and grace is being blessed with good things that we don't deserve. We don't even have an entitlement to be loved by God.
In other words, we should go through life in humility and in gratefulness. We should wake up each day and thank God for all the gracious things His does for us. Thank Him for air to breath and water to drink. Thank Him that He doesn't abandon us when we sin.
Just as we aren't entitled to God's love and goodness towards us, we are also not entitled to love and goodness from other people. We aren't born with absolute rights to have our needs meet by others. We aren't entitled to getting our way, either.
We can surely avoid a great deal of anger and bitterness if we keep things in their proper perspective. It is fine to want your needs met, but it is wrong to demand and expect them to be met.
The fifth chapter of 1 Thessalonians tells us that we should be thankful in everything, rejoice always, and never stop praying. It even says that this is God's will for us.
