Drugs are philosophies.
Psychoactive substances contain a concentrated code-base capable of re-programming the mind. They serve up the blueprint to a particular worldview, encouraging the user to see reality from a particular perspective. They are like chemical philosophies or ideologies; software for the consciousness.
Like philosophies, some drugs are good, while others are bad. There are those that open your mind to new possibilities and stretch you to the limits of your potential, while others seek to dominate you and force you into their dogmatic way of thinking.
Choose your philosophies carefully for they define you.