3rd Nephi 13:16-18

Moreover, when ye fast be not as the hypocrites, of a sad countenance, for they disfigure their faces that they may appear unto men to fast. Verily I say unto you, they have their reward. But thou, when thou fastest, anoint thy head, and wash thy face; That thou appear not unto men to fast, but unto thy Father, which is in secret; and thy Father, which seeth in secret, shall reward thee openly.

Christ does not want us to wear our faith on our sleeve, but he wants us to have a personal relationship with him. He does not want a people who are loud and boisterous about how well they follow Christ.