Some things are preached as preferences. Beards are not discussed in scripture too much, but the Jews were commanded not to touch their beard.
Leviticus 19:27:Ye shall not round the corners of your heads, neither shalt thou mar the corners of thy beard.
Leviticus 21:5:They shall not make baldness upon their head, neither shall they shave off the corner of their beard, nor make any cuttings in their flesh.
There seems to be an all or nothing approach when it comes to beards in the Bible, therefore, sense we can't look neat with a beard that is never trimmed, we should shave it off.
As for the sleeves, a line has to be drawn somewhere. I don't want people up on our platform with muscle shirts on. If you don't draw the line somewhere, you
're going to have a hard time maintaining any type of holiness.