Joshua and the need for spiritual sons

Sermon synopsis: What lesson can we learn from Joshua who was a spiritual son to Moses?

Deut 31:7 Then Moses summoned Joshua and said to him in the presence of all Israel, ‘Be strong and courageous, for you must go with this people into the land that the Lord swore to their ancestors to give them, and you must divide it among them as their inheritance. 8 The Lord himself goes before you and will be with you; he will never leave you nor forsake you. Do not be afraid; do not be discouraged.’