Some people in ancient times believed that the power of sorcerers" rites and incantations lay in their secrecy, as noted above. Magical secrets supposedly lost their power when they were made public. The fact that the converted Ephesian magicians disclosed these shows the genuineness of their repentance. Likewise the burning of books symbolizes the public and irreversible repudiation of their contents. Luke did not describe the silver coin to which he referred in enough detail to determine its value, though it was probably a drachma. Fifty thousand silver coins in any case represents much money and many converts. If these were drachmas, the value was50 ,000 days worth of wages. That would amount to several million dollars worth of wages in present earning power. [source][source][source]
"It is all too true that too many of us hate our sins but cannot leave them. Even when we do seek to leave them there is the lingering and the backward look. There are times in life when treatment must be surgical, when only the clean and final break will suffice." [1][source]