'Wood' in the Bible

Why do you see the speck in your brother's eye, but fail to see the beam of wood in your own?

How are you able to say to your brother, "Brother, allow [me] to remove the speck [that is] in your eye," [while] you yourself do not see the beam of wood in your [own] eye? Hypocrite! First remove the beam of wood from your [own] eye, and then you will see clearly to remove the speck [that is] in your brother's eye!

For if they do these things when the wood is green, what will happen when it is dry?”