Christopher Wren's convictions, not his structural columns, support London

 The noted English architect Sir Christopher Wren once built a structure in London.  His employers claimed that a certain span Wren planned was too wide, that he would need another row of columns for support.  Sir Christopher, after some discussion, acquiesced.  He added the row of columns, but he left a space between the unnecessary columns and the beams above.  The worthies of London could not see this space from the ground.  To this day, the beam has not sagged.  The columns still stand firm, supporting nothing but Wren’s conviction.  Leadership is much more than an art, a belief, a condition of heart, than a set of things to do.  The visible signs of artful leadership are expressed, ultimately, in its practice.

De Pree M O (1989)  Leadership is an Art.   Melbourne: Australian Business Library, Information Australia. pp.   135-136

Think about it:  The visible signs of  leadership are expressed in its practice.