Be strong and of good courage

And David said to Solomon his son, Be strong and of good courage, and do it: fear not, nor be dismayed: for the Lord God, even my God, will be with thee; he will not fail thee, nor forsake thee, until thou hast finished all the work for the service of the house of the Lord.

1 Chronicles 28:20 KJV

David inspired and encouraged Solomon so that he could accomplish the mission of building the temple. David wanted to build the temple himself but God did not allow and so he had to hand over the responsibility over to Solomon. It was a great responsibility for Solomon as he had to be strong and courageous.

Building anything takes a lot of courage, patience, persistence, faith and prayers. You cannot afford to be afraid or weak but you have to know that God is with you. When you take a decision that is not popular because God asked you to do it, you may be afraid because the people may not fully understand but you have to be courageous. God will not fail you until you have finished all the work for the service of the house of the Lord.