The Word of God is quick and powerful and sharper than a two-edged sword. When used skillfully and spoken wisely, it becomes a spiritual scalpel that makes incision upon the heart and takes out what ought not be there and puts in what ought to be.
But when wielded unskillfully and unadvisedly, that same sword will do more harm than good. An unwise practitioner can kill with the Word. Caution is advised. We must always speak the truth in love.