I don't know of a single Christian who doesn't want to experience transformation into Christ-likeness. We know this is an ongoing process and it is a work of the Holy Spirit. When you think of model Christians, people whose lives you'd like to emulate, do you realize that what made them special was not their ability to muscle through trials, temptations and the mundaneness of daily life, but that they experienced God in the midst of it all? They were not heroic and they were self-aware enough to know that God was at work in them, to will and to work for His good pleasure (Phil 2:13). Like David, they relied on God to uphold them with a "willing spirit" (Psalm 51:12b).
I am not saying they did not play a role in what we find so attractive about them. Their role was to give God consent. God no doubt used His Word and the influence of other Christians to motivate them to see their own need for transformation. Then, by His Spirit, He wooed them. At some point they said and kept saying, "Yes, Lord, have your way in me!" There were, no doubt, as many great Christians of days past have testified, seasons when they weren't sure they wanted God to have His way. They would then find themselves praying, "Help me to want what you want. Give me a willing spirit!"
God can do anything in a person who wants to come under His influence! He is simply waiting for consent. Will you say yes? God will not deny the gift of a willing spirit to those who simply say yes.