"The question isn't who is going to let me; it's who is going to stop me?"- Ayn Rand
A car can only be stopped from moving by the engine that provides it with the power. You must never allow yourself to be stopped from graduating into higher accomplishments by failures and detractors, simply because, they are not the sources of your power!
Your power can only be taken away by the source; where you got it from. Fortunately, God is not against you, but for you. God's plans are not meant to harm you, but to prosper you and give you an expected end.
Never get frightened by the mockeries of naysayers because, they are not the reason why you live. If obstacles make you to fall down, rise up quickly and say to them; "I am coming back again"!
Persist till the end and you will smile at your obstacles. Be in focus, direct all your scattered attention into that channel and you will surprise the imposibilitarians!