Twentieth_Century(i)
2 He who, when speaking, uses the gift of 'tongues' is speaking, not to men, but to God, for no one understands him; yet in spirit he is speaking of hidden truths.
3 But he who preaches is speaking to his fellow men words that will build up faith, and give them comfort and encouragement.
4 He who, when speaking, uses the gift of 'tongues' builds up his own faith, while he who preaches builds up the faith of the Church.