It seems like God would say:

It might take a little while! A few words or phrases in tongues might not affect your emotions but it would be hard for a person to continue for half an hour without feeling different. No-one could pray or sing in my spirit for an hour without feeling joy.

You’re wondering why talking apparent nonsense can make you happy – it’s my joy you start to feel. My one-ness with you is my great delight. My one-ness with humanity is my greatest delight and to me each and every person is uniquely important and loved.