The difficulty is balancing this tremendous freedom and dependence on God. Surrendering to God's will does not necessarily mean accepting things as they are, surrendering to the status quo. We use our freedom to co-create (with God) the reality in which we live. There is a joke about a pastor who prayed day after day to win the lottery to help the poor of his parish, and when he died he was expressing his anger at God for not answering his prayer. God says to the man, "Give me a break, you could have at least bought a ticket!" With freedom and faith there comes a responsibility to see the opportunities we are given and to act on them. At the same time, one must be careful not to use the "God helps those who help themselves" mentality to blame the victim.
The relationship between freedom and surrender means using freedom to try to act in accordance with God's will, but how do we know God's will? While there are many different ways and traditions of discernment in Christianity, the bottom line is we never know with absolute certainty that our actions are in accordance with the will of God. Presuming to know God's will is a dangerous business. The uncertainty with which we live is part of that to which we surrender. I have always taken comfort in the humble words of a prayer by Thomas Merton:
MY LORD GOD, I have no idea where I am going.
I do not see the road ahead of me.
I cannot know for certain where it will end.
Nor do I really know myself,
and the fact that I think that I am following your will
does not mean that I am actually doing so.
But I believe that the desire to please you
does in fact please you.
And I hope I have that desire in all that I am doing.
I hope that I will never do anything
apart from that desire.
And I know that if I do this
you will lead me by the right road
though I may know nothing about it.
Therefore will I trust you always
though I may seem to be lost
and in the shadow of death.
I will not fear, for you are ever with me,
and you will never leave me to face my perils alone.