Weeping may endure for the night, but joy comes in the morning.  Psalm 30:5  Joy is a fruit of the Spirit.  That means that the Spirit of God is full of joy.  When we are in His presence, the joy of the Spirit touches our hearts and fills our minds.  Joy in the Holy Spirit is not worldly but jubilant, supernatural bliss.  There is joy that makes you want to sing and dance before the Lord like David did when God gave him victory over his enemies.  Soak in the love of God's Spirit.  Rejoice in His presence and experience heavenly glory.  All else will fade away.  To find a biblical definition of spiritual fruit, read Galations 5:22.  enjoy!