Why do we do what we do?

Why do we do what we do? Do we go to church because its a Sunday? Do we read the bible because we want to or because we feel obliged to? Do we spend time with God or just say a quick prayer and call it job done? Do we believe that Jesus died for us or do we just think its a nice story that we learnt at church?
In Philippians chapter 2, Paul says that we should do everything humbly, nothing out of selfish ambition or gain. We need to make sure that everything we do is for the right reasons - to glorify God and lead others into a relationship with Him.
In verses 5-11 Paul says this: 
Your attitude should be the same as that of Christ Jesus:
Who, being in very nature God, did not consider equality with God something to be grasped, but made himself nothing, taking the very nature of a servant, being made in human likeness.
And being found in appearance as a man, he humbled himself and became obedient to death— even death on a cross!
Therefore God exalted him to the highest place and gave him the name that is above every name, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father. 
Jesus was humble, He was obedient, He came to earth to serve and to die. We need to make sure that everything we do, glorifies Him. He deserves our praise, our worship, our lives, He deserves and asks for our all - let's not let Him down, let's put everything into our lives for Jesus, so that His name will be lifted high. 

That I would decrease so that He would increase!