The women had found Christ’s tomb empty. The angel of the Lord appeared to tell them to go share the good news. 
The ladies responded with obedience because they respected the Lord. They ran to share the good news, with great joy. 
When the Lord calls you to serve him remember what the ladies experienced:

Obedience, as a result of godly fear, brings great joy. 
Scripture taken from: Matthew 28:1-8