Im not the one who said people should never pray aloud.
Matthew 6
5 And when thou prayest, thou shalt not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
6 But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.
The closet is not a literal closet, it is within you, the same place the kingdom of God is.
No you did not say that, Its me that said it, i base my belief on what Jesus said.
Someone posted upthread the times when Jesus prayed aloud, and other scriptural references to praying aloud. You might have a look.
Blessings in the new year.