In my lifetime, I have never seen a greater need than now for wholehearted warriors—those who are all in.
I've noticed that stories of wholehearted warriors often start with a heart statement like Joshua's: "As for me and my family, we will serve the Lord" (Joshua 24:15).
Or at the most pivotal point, they declare their full allegiance to obedience to God, even if it costs them everything. For example, Esther: "If I die, I die" (Esther 4:16). Or Job: "...though he slay me, yet I will trust in Him" (Job 13:15). Or Job again: "...the Lord gives and the Lord takes away, blessed be the name of the Lord" (Job 1:21).
Or Shadrach, Meshach, and Abednego in Daniel 3:17-18 when they tell the King their God has the power to deliver them...but even if their God chooses not to, they still won't bow down to the golden image.
These people are all in. They are fully aware that we serve a living flame—a consuming fire—there's no room for another allegiance.
Consider the actions of Gideon when he whittled down his men in obedience, facing what must have looked like certain defeat (Judges 6-8). Or Ruth when she surrenders her identity as a Moabitess and covenants herself to Naomi's God: "For where you go I will go, and where you lodge I will lodge. Your people shall be my people, and your God my God" (Ruth 1:16-17). They declare they are all in and on God's side. God rescues them and his people again and again.
Both the disciples and Paul declare it regularly—and, unlike Shadrach, Meshach, and Abednego, rescue doesn't always come. Eventually, after God rescues them many times, these warriors lose their lives. But they counted this loss as fully worthwhile. They were all in. They relied wholeheartedly on the One who is Faithful and True to his words.
Peter was one of the first to have the revelation of his rabbi as God-appearing-in-the-flesh. During the storm, Peter confirms it is Jesus walking on the stormy waves. He immediately steps out of the boat at Christ's command to "Come" (Matthew 14:28-33). When Peter stepped out, he didn't rest his weight on the water, he stood on Christ's command: "Come!" Peter trusted that if Jesus commanded him to do the impossible, the power to obey would be supplied within the command. Notice that Christ did not say "Go." He said, "Come." As with all things Christ commands, he is both previous AND present: "Come to me" he commands his disciples, and he enables us to obey by his own power and then transforms us as we draw nearer to his presence. "Go into all the world," Christ later commissions us. "And I will be with you..."
Rest assured, there's never any command from God that we must accomplish on our own.
"Breathe," he says to Adam and he supplies the breath. "Be holy" he commands at the inauguration of his covenant. Then he enables us to obey by his power and then does the work of transformation as we draw nearer. "Come out of Egypt," he calls to Israel and then clearly, definitively, demonstrates that he accomplishes this by his own power (Exodus 19:4). "Turn," he says to the Israelites waiting at Mount Horeb. "Take up the journey...come...possess the land I have promised you" (Deuteronomy 1:6b-8). And, most importantly, he says to the unbeliever: "Believe in God, believe also in me..." (John 14:1). Then he supplies the faith to do so.
Every command God speaks, he supplies.
Transformation is God's work. Faith is the channel through which we experience it. Christ-likeness is the end result. All of this is supplied by Christ Himself.
A wholehearted warrior KNOWS the God who commands them—that he'll come through for them, for you. And if He doesn't come through like you hoped or thought, a wholehearted warrior is reconciled to trusting anyway: if I perish, I perish.
For the one who gave us life, nothing is a sacrifice.