Verily, verily, I say unto you, Except a grain of wheat fall into the earth and die, it abideth by itself alone; but if it die, it beareth much fruit.
It may seem shocking to many, but the reality is that we are expendable to God! Yes God loves and cares for us. He who sees the sparrow fall, and knows the very number of the hairs on our heads, is concerned for us through the trials we go through. Yet, we are expendable.
God calls us to lose all for His sake, in His service; even our very lives if necessary. When He calls us to lose our lives for His sake, we might very well face persecution and martyrdom. We are in a spiritual battle for the kingdom of God and the souls of men. Just like an army will count men as expendable, sending them out to die for the greater purpose of winning the war, we too are sent out to die for the sake of the gospel, giving our very lives if it so be, so that another can find life in Christ.
Remember, we are living in these bodies upon this earth for a short time. We are spiritual beings with souls that will live on throughout eternity. To face death for Christ is truly no loss to us, as to be absent from this body, is to be present with the Lord (2 Cor 5:6-8). So even though we are expendable for the cause of Christ, it is no real loss to us, in fact, it is great gain.