Up to this point the disciples hsd spoken to God as YHVH, referring to Him as Lord.  Now, Jesus tells His disciples to speak to YHVH using the name Jesus.<p><b class=highlight>In the NameOfJesus is literally using the name, Jesus</b>.<p>The Lord wants us to be joyful.  The second fruit of His HolySpirit is joy. Expect it, claim it and walk in it. It is part of your inheritance in Christ Jesus.