Surrender to God through Christ is important because we need to submit our wills to God's will, something at the heart of what Jesus showed us in his life and teaching.
Too often we see surrender as merely passive. We give up and give in, and then, so to speak, go with the flow. There is a true sense in which it is passive in that in true surrender we accept God's will and way for us, against our own will and way.
But surrender needs to be seen as also active. We actively pursue God's will, and seek to follow his ways. We seek to continue to unlearn the old "in Adam" as we seek to keep learning the new "in Christ."
Surrender involves joining a new side, and becoming active on that side. Finding a new way of life and purpose for living, that indeed gives us life through Jesus by the Spirit for God and for the world.
What have you found in your own life about surrender, or what would you like to add here?