A moment is precious. It's joy lies in its joy. The present becomes heavenly. That feeling can't be explained, only experienced. Those beautiful moments are the only things that really matter. Because the joy of their past will find its imprint on your soul.
We mistake this same joy in another form. We feel that this joy will manifest itself in things. In a house, car, clothes, and other material things. It's a sense of mistaken identity - our sense of joy seems mistaken. So, instead of collecting moments of joy, we start collecting things which are supposed to bring us joy.
Those joyful moments come through happy relationships. It comes when we bring positivity in a situation. It comes when we can put a smile on someone's face, or remove a tear. It comes when we have done justice to our humanity. This is our true collection.
Collect moments, not things.