James warns us against the temptation of putting ourselves in the place of God. First and foremost, speech that judges or criticizes a fellow-Christian usurps the place of God. The other danger is in relation to one's future plans. We have no idea what today will bring, let alone tomorrow. Again, we see that genuine faith produces humility. Once we learn the humility to accept God's sovereign ordering of all life and to live within that, then we see more clearly the life God has called us to live in wholehearted devotion to Him.