Romans 5:5 Now hope does not disappoint, because the love of God has been poured out in our hearts by the Holy Spirit who was given to us.
A vain hope deceives us because the hope that we have will always be dashed and leave us wanting; but the hope that God gives us is certainly not vain!
He gives us a hope that allows us to love openly because of the love that He poured into us through the Holy Spirit. That love then can overflow from our hearts and to those around us giving us a firm knowledge that it is Christ who put it there.
We should never be ashamed of that love that He gave us to share with others!