If God told you to do it, then there is no heavenly reason, nor logical reason for you to quit.
… after you have patiently endured, you obtained the promise.
Therefore, my beloved, be stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord.
Thou therefore endure hardness, as a good soldier of Jesus Christ.
… According to your faith be it unto you.
.. if thou canst believe all things are possible to him that believeth