According to Glass Guru:
– You cannot cut glass half-way, you must follow through right till the end.
– If you do not treat the glass right, it will cut you.
– If you fear the glass, it will not listen to you.
– Machine-made glass is smooth and cheap
-Handmade, real glass has ridges and air bubbles – such characteristics makes it more highly valued and beautiful.
– Glass is temperamental.