Why fight to do good if heaven is mine already?

I get that a lot. People who listen to the Gospel of Jesus Christ and ask - 'If I get to go to heaven not because of what I did but because of what Jesus Christ did in my place, why do I still need to struggle and fight and discipline myself to do good? If it doesn't earn me heaven, why be good?'.

Glen Scrivener over at Christ the Truth has a list of clever counter questions, challenging the assumptions underlying this response. In a nutshell he says what you're really saying when you ask this question is: 'Sin is what really gives meaning an joy to my life. I can't imagine life without my life-giving sin. The life with Christ is going to stifling and difficult.'

Perhaps that is why we don't easily get the Gospel. Jesus is not scaring us into heaven saying: "My yoke is hard, but hell is harder!". No! - the Gospel is something completely different. It is not scare mongering but the ultimate love story.

Christ that comes to us, pursues and seeks us and then lays down his life to save us. That is why he says:

"Come to me, all you who are weary and burdened, and I will give you rest. Take my yoke upon you and learn from me, for I am gentle and humble in heart, and you will find rest for your souls. For my yoke is easy and my burden is light." Matthew 11:30

Prayer
Lord Jesus Christ, help us to see that we were created for you - that you're yoke is the one that is comfortable and the only one that really fits. Help us to give ourselves to you like a bride gives herself to her new husband - willingly, gladly and joyfully - and resting in your unconditional eternal love for us. Amen