Be Strong & Very Courageous

No man shall be able to stand before you all the days of your life. As I was with Moses, so I will be with you; I will not fail you or forsake you.

Be strong (confident) and of good courage, for you shall cause this people to inherit the land which I swore to their fathers to give them.
 
Only you be strong and very courageous, that you may do according to all the law which Moses My servant commanded you. Turn not from it to the right hand or to the left, that you may prosper wherever you go.
 
This Book of the Law shall not depart out of your mouth, but you shall meditate on it day and night, that you may observe and do according to all that is written in it. For then you shall make your way prosperous, and then you shall deal wisely and have good success.
  
Have not I commanded you? Be strong, vigorous, and very courageous. Be not afraid, neither be dismayed, for the Lord your God is with you wherever you go.

Joshua 1:5-9 (Amplified version)

Those who hope in God

have reason to be of good courage,

and let their hearts be strong,

for as nothing truly evil can befall them,

so nothing truly good for them shall be wanting to them. 

Matthew Henry