Failure is a word that is not of God. When God created mankind and they sinned, He did not say He failed. When people refuse to believe on Jesus as their Lord and Saviour and they end up in hell, God does not say He failed. When we believe in Jesus and are reborn and we walk through this life and do not do something the way God would like us to do it, He does not say, you failed. "You failed, or I failed", is a thought and influence from the demonic realm. When we speak it we are then in agreement with the demonic realm and we are not in agreement with God anymore.
What does God say?
Romans 8:28 (KJV)
28 And we know that all things work together for good to them that love God, to them who are the called according to his purpose.
Those are the words we should be speaking and coming into agreement with. They are words of life. We should be thanking the Lord for His goodness and mercy when we miss the mark in our lives. We thank the Lord for His promises, His goodness, and His love.
In the name of Jesus, I bless you with the life of God.