The child Samuel grew before the Lord. 1 Samuel 2:21

Samuel's mother, Hannah, promised God she would give her son to His service.  

That meant Samuel left home at a very young age to work in the temple.  Perhaps he often missed his family.  But God surely used Samuel to be a great help to the people of Israel.

One missionary left his home and family to help jungle people who had never heard that God loves them.  He often missed his family, but his obedience to God's call meant that many jungle people learned about God's love.

Prayer: Lord, help me to obey Your will, whatever it may be - for Jesus sake.  Amen.