“My dear postman, no one will be able to stand before you all the days of your life; as I was with Moses, so will I be with you; I will not leave you nor forsake you.
Be strong and courageous, for you will put this people in possession of the land that I swore to their fathers to give them. Only be very strong and courageous.
Take care to put into practice all the law that Moses my servant gave you; do not stray from it to the right or to the left, that you may prosper wherever you go.
This book of the law shall never depart from thy mouth, but meditate upon it, day and night; take care to put into practice all that is written therein; for then shalt thou succeed in all thy undertakings, then shalt thou prosper.
Have I not commanded you? Be strong and courageous; do not be afraid or dismayed, for the LORD your God will be with you wherever you go.
(see Joshua 1:5-9)