Things which have failed men

Subtlety-mischief

Acts 13:10  

“You are a child of the devil and an enemy of everything that is right! You are full of all kinds of deceit and trickery. Will you never stop perverting the right ways of the Lord?

Goodness

Romans 15:14  

I myself am convinced, my brothers, that you yourselves are full of goodness, complete in knowledge and competent to instruct one another.

Heaviness

Philippians 2:26  

For he longs for all of you and is distressed because you heard he was ill.

Light - Darkness

Luke 11:34-36  

34 Your eye is the lamp of your body. When your eyes are good, your whole body also is full of light. But when they are bad, your body also is full of darkness.

35 See to it, then, that the light within you is not darkness.

36 Therefore, if your whole body is full of light, and no part of it dark, it will be completely lighted, as when the light of a lamp shines on you.”