Phil4:13 For I can do everything through Christ, who gives me strength.
Kenneth E. Hagin told a story about when he was raised from the sick bed. He was still frail and weak but he decided to get a job in town. His boss doubted his ability to work but because he knew that the strength in him was not determined by his physique, he did more than those that were perceived as able bodied.
As a child of God, you are not permitted to say 'No I can't'. The only thing you should say no to is sin. Aside that, every other good thing that is in line with God's plan and purpose for your life, I want you to know that you can do them because the word of God said so. Don't write yourself off and say no I can't.
God's ability is at work in you as long as you are born-again. When you feel discouraged and the devil is telling you that your ability isn't enough, just tell him that your strength can't prevail but God's strength is at work in you. Speak in tongues and stir that anointing. I am here to tell you that with God's strength, you can.
You can succeed in that exam&school, you can be the next star, yes you can make it in life even when others fail.
CONFESSION: The ability and strength of God is at work in me to do exploit, I am made and wired to do great things. I live in a world of possibilities, nothing shall be impossible for me because God's strength is at work in me In Jesus Name.