Churchill said:

“A pessimist sees the difficulty in every opportunity, and optimist sees the opportunity in every difficult.”

Proverbs 18:21 say: the tongue has the power of life & death.

The words we think and speak to ourselves can impose on us good, or harm.  We owe most of our personal self-destructive scars to our damaging self speak. 

Jacob is pessimistic when he says: 

Gen.42:36 all these things are against me.

David is optimistic when he said:

Difficulty is instructive,

Psalms 119:71 It is good for me that I have been afflicted; that I might learn Your Word

Difficulty is corrective,

Psalms 119:67 before I was afflicted I went astray: but now I obey Your Word.

Difficulty is life giving

Psalms 119:50 this is my comfort in my affliction: for Your Word has given me life.