John 4:13-14 says:

Jesus replied, “Anyone who drinks this water will soon become thirsty again. But those who drink the water I give will never be thirsty again.  It becomes a fresh, bubbling spring within them, giving them eternal life.”

The joy that Christ gives us is eternal just like the life we have in Him.  The things of this world may give us joy but like the water from the well Jesus is referring to it will only temporarily quench our thirst.  Jesus is the key to sustaining our joy.  Turn your life over to Him and the joy will overflow. Trust me. Seriously. Trust me.