Ecclesiastes 10:10
Book: Ecclesiastes 10
If the iron be blunt, and one do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.
Matthew 12:32
Book: Matthew 12
And whosoever shall speak a word against the Son of man, it shall be forgiven him; but whosoever shall speak against the Holy Spirit, it shall not be forgiven him, neither in this world, nor in that which is to come.